I agree, I could have left the x86 vredist versions installed, but I wanted to make sure they were not conflicting with the same x64 versions. They came from some old games I don't play anymore, so I really don't mind.
I don't have the exact screenshot of the error that happens when clicking a Midi FX while a project is open, but I can share the similar one that pops-up while loading.
Thanks again for your help, but the cakewalk discovery journey ends here for me.
Like I said before, "life just should not be this hard"..
The recent update not installing automatically, did not help restore faith either.
Cakewalk is just not the DAW for me.
To be complete, I did do the regsvr32.exe thing, even un-installed before installing after moving. And also Run as Administrator.
regsvr32 /u /s Arpeggiator.dll
regsvr32 /u /s ChordAnalyzer.dll
regsvr32 /u /s EchoDelay.dll
regsvr32 /u /s EventFilter.dll
regsvr32 /u /s Quantize.dll
regsvr32 /u /s TcMfxSustainFix64.dll
regsvr32 /u /s Transpose.dll
regsvr32 /u /s Velocity.dll
regsvr32 /s Arpeggiator.dll
regsvr32 /s ChordAnalyzer.dll
regsvr32 /s EchoDelay.dll
regsvr32 /s EventFilter.dll
regsvr32 /s Quantize.dll
regsvr32 /s TcMfxSustainFix64.dll
regsvr32 /s Transpose.dll
regsvr32 /s Velocity.dll