If I want to run Mystic on a Win 32Bit OS from a 64Bit OS I can just
copy the EXEs over without effecting the setup??
Yes thats all you have to do.
Download the new bit-level you want and then you can do "install replace c:\mystic" and it should replace the .exe files for you.
If you are using Python you'd probably need to reinstall the proper version of that too, since it would need to match Mystic.
... Multitasking: Reading in the bathroom
--- Mystic BBS v1.12 A49 2023/01/17 (Windows/64)
* Origin: Sector 7 * Mystic WHQ (1:129/215)