Request a fresh R2LIC from support. Never edit .r2lic files. Error 2: “License does not match this version” Cause: You are trying to use an R2LIC from Rainlendar v2 with the newer Rainlendar v3 Lite (or vice versa). R2LIC files are generally forward-compatible, but not backward.

Update Rainlendar to the latest version (v3.22.2 as of 2025). If you have an old license, contact support for a free upgrade. Error 3: “License count exceeded” Cause: Your Personal license allows 5 simultaneous activations. You’ve installed on more than 5 machines.

Run Rainlendar as Administrator once (Windows) or repair permissions on ~/.config . Error 5: “Expired license” for a perpetual license Cause: By mistake, you purchased a subscription-based license (rare; only for business cloud features).

However, many users who purchase Rainlendar Pro encounter a specific term during installation or activation: . If you’ve ever seen a .r2lic file extension or received an email with an “R2LIC code,” you might have wondered: What is this, and how do I use it?

Introduction: What is Rainlendar? For over two decades, Rainlendar has stood as a gold standard for desktop calendar applications. Unlike bloated productivity suites that consume gigabytes of RAM, Rainlendar is lightweight, customizable, and unobtrusive. It sits directly on your desktop background, displaying events, tasks, and reminders alongside your wallpaper.