If you specifically need version 6.69, you can find it on the Old Versions page of the official REAPER website.
: REAPER 6.69 is covered by any license purchased during the version 5 or 6 cycles. A license is valid for two full version cycles (e.g., buying at 6.0 covers you through 7.9). REAPER 6.69 update - did you know about the loopback? cockos-reaper-6-69-patch
: If you want to test 6.69 without affecting your current REAPER setup, choose the "Portable install" option during the Windows installation process to keep it in a separate folder. Resources for Version 6 If you specifically need version 6
: Before updating, go to Options > Preferences > General and click Export configuration . Save this file as a backup in case you need to revert. REAPER 6
: Improvements were made to screen-reader support for the video processor and keyboard navigation for shortcuts (e.g., using the "Delete" key to remove shortcuts). How to Install or Update to 6.69