Some clarification is on order.
AxCrypt 2 still supports both 32-bit and 64-bit Windows.
The problem here is that Andy is using a 3rd party 32-bit shell (Xplorer2) on 64-bit Windows.
AxCrypt will install a 64-bit shell extension on 64-bit Windows (and a 32-bit shell on 32-bit Windows). But a 32-bit shell can’t load a 64-bit shell extension (makes sense, right?).
This mixed bitness scenario between Windows and 3rd party shells scenario will never be supported, and it’s somewhat of an abomination anyway… ;-) Sorry. I go with my initial suggestion – get with the times and go 64-bit all the way, your problems will not become less with time, only worse.