Reaper-license.rk

Launch REAPER and navigate to > License/Registration from the top menu bar.

If you meant something else by , could you clarify? For example: reaper-license.rk

Cockos recommends that you search your email for "REAPER License Purchase." You should have received the license text when you originally purchased REAPER. If you find it, you can copy and paste it to re-activate REAPER. Launch REAPER and navigate to > License/Registration from