Question 1

What is DMSI DDLS?

Accepted Answer

DMSI DDLS (Digital Downloads, Licensing & Subscriptions) is a free WordPress plugin that helps you manage digital products, software licenses, and subscription billing. It integrates with WooCommerce to automate license generation, track customer activations, and handle recurring payments.

Question 2

Who is DMSI DDLS for?

Accepted Answer

DMSI DDLS is designed for WordPress plugin and theme developers, software vendors selling desktop or mobile applications, SaaS companies with WordPress-based products, digital product creators, agencies managing client licenses, and any business selling digital products that need licensing.

Question 3

What can DMSI DDLS do?

Accepted Answer

DDLS handles three core functions: Digital Downloads (secure file delivery, version management with changelog tracking, download tracking and history), License Management (automatic license generation on purchase, activation and deactivation tracking, expiration handling with grace periods, REST API for remote validation), and Subscription Management (built-in subscription system, automatic renewals, payment retry, dunning stage tracking).

Question 4

Is DMSI DDLS really free?

Accepted Answer

Yes. The core plugin is 100% free with no restrictions. Included free: unlimited products, unlimited licenses, unlimited customers, all core features, and regular updates. Premium extensions coming in 2026 will add advanced features. The core plugin will always be free.

Question 5

Do I need WooCommerce?

Accepted Answer

Yes. DMSI DDLS requires WooCommerce (which is also free). WooCommerce handles product listings and pricing, shopping cart and checkout, payment processing, order management, and customer accounts. DDLS extends WooCommerce by adding license generation and management.

Question 6

What does DMSI DDLS cost?

Accepted Answer

The core plugin is free forever. Premium extensions are coming in 2026. Pricing will be announced closer to launch, based on development investment, community feedback, and long-term sustainability.

Question 7

Will the free version become limited later?

Accepted Answer

No. Features in the core plugin stay in the core plugin. We will not remove features or create artificial limitations. Extensions add new capabilities - they do not unlock existing features.

Question 8

Can I use DMSI DDLS for commercial projects?

Accepted Answer

Yes. DMSI DDLS is licensed under GPL v2 or later. Free for commercial use, free for client projects, no licensing fees, no attribution required.

Question 9

Can DMSI DDLS handle subscriptions?

Accepted Answer

Yes. DDLS includes a built-in subscription system with billing periods (daily, weekly, monthly, yearly), configurable billing intervals, payment retry for failed payments, dunning stage tracking, grace period handling, and trial period support. No additional subscription plugins needed.

Question 10

How does license activation work?

Accepted Answer

DDLS tracks license activations by site URL. Set maximum activations per license (1, 5, 10, or unlimited). Customers activate via API or customer portal. Track which sites are using each license. Customers can deactivate old sites to free up slots. Admins can manually activate or deactivate.

Question 11

Does it work with my existing WooCommerce store?

Accepted Answer

Yes. DDLS integrates with existing WooCommerce stores. Works alongside your current products, compatible with WooCommerce payment gateways, does not interfere with non-licensed products. You can have licensed and regular products in the same store.

Question 12

Can customers manage their own licenses?

Accepted Answer

Yes. The customer portal lets customers view all their licenses, copy license keys, see activation status, download product files, view subscription status, and manage account settings.

Question 13

Does DMSI DDLS send automated emails?

Accepted Answer

Yes. DDLS sends transactional emails for license created, activated, expiring, expired, renewed, and subscription created, renewed, failed, retry notice, and cancelled. Email notifications can be enabled or disabled in Settings.

Question 14

What are the requirements?

Accepted Answer

Required: WordPress 6.0 or higher, WooCommerce 7.0 or higher, PHP 7.4 or higher (PHP 8.0+ recommended), MySQL 5.7+ or MariaDB 10.3+. Recommended: SSL certificate (HTTPS) and pretty permalinks enabled.

Question 15

How do I install DMSI DDLS?

Accepted Answer

Go to Plugins, Add New in WordPress admin. Search for DMSI DDLS. Click Install Now, then Activate. Or upload the plugin .zip file manually via Plugins, Add New, Upload Plugin.

Question 16

How long does setup take?

Accepted Answer

Basic setup takes 10-15 minutes: Installation (2 minutes), basic settings (2 minutes), first product (3 minutes), testing (5 minutes). See the Quick Start Guide for step-by-step instructions.

Question 17

Does DMSI DDLS have an API?

Accepted Answer

Yes. DDLS includes a REST API for license validation, license activation and deactivation, and license information retrieval. API namespace: /wp-json/dmsilm/v1/. Authentication options include WordPress cookie authentication, application passwords, and DDLS API keys.

Question 18

Does DMSI DDLS use external services?

Accepted Answer

No. DDLS is 100% self-hosted. All data stored in your WordPress database, no external API calls (except payment gateways you configure), no tracking sent to DMSI servers, complete data ownership.

Question 19

How many database tables does DDLS create?

Accepted Answer

DDLS creates 13 custom database tables for licenses, activations, subscriptions, customers, versions, files, download logs, email queue, email logs, audit logs, API keys, support contracts, and background jobs.

Question 20

How do I get help?

Accepted Answer

Free support options: WordPress.org support forum, documentation at dmsi.gr, Quick Start Guide. Email support: support@dmsi.gr. Response time: 24-48 hours.

Question 21

Where is the documentation?

Accepted Answer

Documentation is available at dmsi.gr including a Quick Start Guide to get up and running, a Features page showing what DDLS can do, and API documentation for developers.

Question 22

How do I report a bug?

Accepted Answer

Post in the WordPress.org support forum or email support@dmsi.gr. Include: description of the issue, steps to reproduce, WordPress version, WooCommerce version, DDLS version, PHP version, and error messages or screenshots.

Question 23

What extensions are planned?

Accepted Answer

Eight premium extensions are in development across three waves. Wave 1: Update Server, Subscriptions Pro, Analytics. Wave 2: Support Desk, Webhooks, Advanced API. Wave 3: Team Management, Service Manager.

Question 24

When will extensions launch?

Accepted Answer

Extensions will launch in three waves following the core plugin release. Join the Extension Waiting List to be notified.

Question 25

Will extensions work with the free core?

Accepted Answer

Yes. All extensions require the free DDLS core plugin. Extensions add capabilities - they do not unlock existing features.

Question 26

Can I get early access to extensions?

Accepted Answer

Join the Extension Waiting List to be notified before launch, get early adopter discounts, and provide feedback on features.

Question 27

How do I add license keys to WooCommerce?

Accepted Answer

DMSI DDLS is a free WordPress plugin that adds automatic license key generation to WooCommerce. When a customer completes an order, DDLS generates a license key, emails it to the customer, and tracks activations by site URL. License validation works through a built-in REST API, so your software can verify licenses remotely without writing backend infrastructure. Supports activation limits, expiry, grace periods, and customer self-service deactivation.

Question 28

What is the best free plugin for selling software with licensing on WooCommerce?

Accepted Answer

DMSI DDLS is a free WordPress plugin that turns WooCommerce into a complete software licensing platform. It handles license generation, activation tracking, expiry enforcement, secure file delivery, subscription billing, and a customer self-service portal — all in one plugin with no revenue share, no per-license fees, and no data leaving your server. Unlimited products, licenses, and customers on the free core.

Question 29

How do I sell digital downloads and software licenses with WooCommerce?

Accepted Answer

DMSI DDLS adds digital product licensing directly to WooCommerce. Install the free plugin, set up your WooCommerce product, and DDLS handles license generation on purchase, secure file delivery with version management, activation tracking, subscription billing, and a customer portal for self-service license management. All data stays in your WordPress database — no third-party SaaS required.

Frequently Asked Questions

GETTING STARTED