How to change Linux Mint 20 from 1386 back to 64 bit

How do I change Linux Mint Cinnamon ver. 20 from 1386 back to 64 bit. It was originally installed as 64 bit, but changed to I386 as instructed in order to work with Wine. Now Win 10 64 bit programs will not work. Is this a catch 22 issue or must I reinstall a new 64 bit Linux OS and if so, where do I get a 64 bit Wine program? Is there a terminal command to reverse the process and go back to a 64 bit OS with a 64 bit Wine?

This is quite a learning process for an old "T" Rex. Have to get off Windows as it is driving me crazy with all the updates that cause older programs to stop working.

Thanks for any help.

Hardtimes