Hello,
I have similar issue that some users had already. I installed DF2020 without any issues, however, Studio does not start, no any errors given.
Also, neither one WebApp demos can start (no processes under WebApp Administrator).
Tried 32 & 64 dbExplorer - both do not start. However, DF Compiler starts OK for both versions.
Windows 10 pro, x64, Russian
Regards,