[Bug 33068] PDF-XChange Viewer 2.5.x (32-bit and 64-bit) crashes when trying to save changes/annotations to PDF file

https://bugs.winehq.org/show_bug.cgi?id=33068

--- Comment #68 from Graham  ---
(In reply to Olibuntu from comment #67)
> PDFXCHANGE VIEWER 2.5 (Build 321.0)
> wine-3.0.1
>
> Bug seems to be gone here (32 bit prefix on a 64 bit Linux Mint 18.3).
>
> 32 or 64 bit? There seems to be no direct way: The presence of
> drive_c/windows/syswow64 seems to indicate a 64-bit system. Maybe also "grep
> arch= ~/.wine/*.reg" could give a hint.

Thanks Olibuntu.
I have ~/.wine/drive_c/windows/syswow64, and
$ grep arch= ~/.wine/*.reg
/home/graham/.wine/system.reg:#arch=win64
/home/graham/.wine/userdef.reg:#arch=win64

So I guess, I am using the 64-bit version.