I have never been successful registering the VST3 versions of Bombardier and Rocket.
The VST versions work.
The vst folder is Program files>Common files>VST3
The *.VST3 files are there…the license key files are there.
The key files are dated 2/22/2019. Are they too old?
The key files are fine. Make sure you download the latest version of the plugins. See our support knowledge base on support.stillwellaudio.com for updated builds. VST3 licensing initially didn’t work on REAPER because we released ours before REAPER had VST3 support.