Just downloaded DF 2021 official release.
I then proceeded to uninstall RC1 from Add/Remove programs in Control Panel, and I was greeted with this error

Click image for larger version. 

Name:	Untitled.png 
Views:	33 
Size:	9.8 KB 
ID:	14381

I don't have the "DataFlex 2021 Studio x64.msi", however I still have the RC1 install file "DataFlex 2021 Studio RC1.exe"

I tried to re-run the RC1 installer (hoping that it would give me the options for "Add/Remove Features"/"Repair"/"Uninstall"). The RC1 installer loaded for a few seconds, then informed me that RC1 has already been installed.

Now I am stuck with RC1.
P.S. Windows 10 Pro 20H2 19042.867. I have never had any problems uninstalling all the previous Alpha and Beta versions of DF 2021.

Frank Cheng