https://bugs.winehq.org/show_bug.cgi?id=33068
--- Comment #67 from Olibuntu olibuntu@arcor.de --- 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.