ChemACX: I have upgraded to ChemACX 20.20.1 and would like to revert back to the previous version

I have upgraded to ChemACX 20.20.1 and would like to revert back to the previous version. How do I do this?

A parallel ChemACX install of two versions is not possible. To move to a lower version the current version will have to be completely removed and the required version will have to be installed. However, it is to be noted that after upgrading to a newer version access to the prior version will no longer available on Flexera.