> For the complete documentation index, see [llms.txt](https://brenkel-solutions-eg.gitbook.io/installation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://brenkel-solutions-eg.gitbook.io/installation/english-1/licensing.md).

# Licensing

- [SaaS](https://brenkel-solutions-eg.gitbook.io/installation/english-1/licensing/saas.md): In order to use your demandPlus+ extension, you need an active (trial) subscription. In the following pages you will find instructions how to create or buy your subscription.
- [Create Trial Subscription](https://brenkel-solutions-eg.gitbook.io/installation/english-1/licensing/saas/create-trial-subscription.md): You don't have to buy a subscription directly. demandPlus+ allows you to create a trial subscription for your extension first. During this period, all functionalities of the extension are available.
- [Buy Subscription](https://brenkel-solutions-eg.gitbook.io/installation/english-1/licensing/saas/buy-subscription.md): If your trial subscription has expired, you will need a valid subscription. Learn how to purchase this in this section.
- [Cancel Subscription](https://brenkel-solutions-eg.gitbook.io/installation/english-1/licensing/saas/cancel-subscription.md): Below you will learn how to cancel your subscription
- [Update Fast Spring Account](https://brenkel-solutions-eg.gitbook.io/installation/english-1/licensing/saas/update-fast-spring-account.md): In this section you will learn how to update your Fast Spring account.
- [Fields](https://brenkel-solutions-eg.gitbook.io/installation/english-1/licensing/saas/fields.md): The following are the fields for SaaS licensing
- [On-Premises](https://brenkel-solutions-eg.gitbook.io/installation/english-1/licensing/on-premises.md)


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