Is 32-bit or 64-bit recommended for 64-bit PC?

[context]

I'm setting up a new 64-bit PC running 64-bit Win7 Pro. Several of my applications are 32-bit and run just fine on the 64-bit OS, of course.

Is there a good reason for me to install the 64-bit version of FossaMail?

I ask because I've seen one indication that there could be problems with porting my email history from 32-bit FossaMail on my previous computer.
("FossaMail 64 will not recognize a TB 32 profile and aborts."

Thanks in advance for advice.

[PhoxFyre]

Yes, it better utilizes the x64 architecture of your CPU to increase productivity and responsiveness, basically, better optimization.

[wildbill5891]

Yes, it's 64bits. Also with 64bit you can access more memory .

[back2themoon]

They only problem with the 64-bit version (which might feel somewhat faster, depending on usage type) is that you won't be able to select multiple files in Windows and then right-click/Send to (to add them as attachments automatically). It's a Windows problem and probably occurs on all 64-bit email clients.

It works with a single file (see here on how to do it) - or use the 32-bit version which is not affected by this.