I have switched back to 2020 from 2021 while PG sorts out all the bugs in 2021. I simply installed 2020 over the top of 2021 in C/bb. I would like to be able to switch between years to keep track of how 2021 is being sorted out.
What’s the best way to re-install 2021 on the same hard drive so that I can switch between years? Do I have to have different directories for bb.exe the styles etc. Am I right in assuming that the 2021 styles and RTs will not work with the 2020.

Thanks
Tony