Creating the registry key works for me. Tested on 2 different machines.

I have tried the latest installer and it still doesn't work.
- No option to select the Delphi version in the staller
- TeeRecompile crashes
- No option to select the Delphi version in TeeRecompile

I have tried to install the binary version but it didn't work.
However, this version does offer the option to select the proper Delphi version (the source code version doesn't) and it takes longer to install but fails anyway.

I have exactly the same problem.
Windows 10.

I tried it on two machines: one with the default installation location and one that tries to install to a folder where the user has all rights.