Replace de executable... you will be fine, but for security, make a backup of your wallet
Hm not sure I understand, i download the new wallet I need to do a full new install so how can I just replace the exe file?
Can I just install it in a completely new directory so I have both versions of the wallet and run the new one?
Also can I find the link to the wallet somewhere on the Unify site? I am very careful to download and run things that are posted on forums just to be safe.
go to C:\Users\yourusername\AppData\Roaming\unify and save wallet.dat first in safe place, then keep unify versions in separate folder and execute each one, i think its good