If double-clicking doesn't work due to file association issues:
| Problem | Likely Cause | Solution |
|---------|--------------|----------|
| “Invalid license key” | File corrupted or wrong version | Request a new key from Cockos. |
| REAPER still in evaluation mode | File not imported or placed incorrectly | Import via Help → License. |
| License key rejected after update | License version mismatch | Upgrade license if needed (REAPER v6 vs v7 keys differ). |
| File not found error | Deleted or moved | Restore from backup or re-download. | reaper-license.rk
Installing your license is a non-destructive process. It does not alter your configuration, plugins, or projects. Follow one of the three methods below. If double-clicking doesn't work due to file association
Q: Can I share my reaper-license.rk file with my bandmate?
A: No. The Individual license is strictly for one person on up to two computers (e.g., studio desktop and laptop). Sharing the file constitutes piracy. Your bandmate needs their own license or a Commercial Multi-User license. | | File not found error | Deleted
Q: I lost the file. Can I get a new one?
A: Yes. Email licensing@cockos.com with your full name and email address used for purchase. They are extremely responsive (often within hours) and will re-send your license.
Q: Does REAPER phone home to check the reaper-license.rk?
A: No. REAPER is privacy-focused. It validates the cryptographic signature of the .rk file entirely offline. It does not send your license information to any server unless you manually click "Check for Updates."
Q: Why did my antivirus flag reaper-license.rk?
A: Some overzealous antivirus tools flag any file with a .rk (or unfamiliar .key) extension as a potential "registry key" hack. This is a false positive. Whitelist the file. You can verify the hash of the file against the official Cockos forums if you remain paranoid.