It turns out that to make Wine run in 32-bit-only mode, one needs to:
Remove ~/.wine if it was already created in the 64-bit mode. (WARNING: This removes all stuff you have installed under Wine. Move it aside instead if you want to avoid dataloss.)
Set the WINEARCH environment variable to win32 i.e. export WINEARCH=win32
All you have to do is, Browse the PlayonLinux's Virtual Drives. Go to the WINEPREFIX/drive_c/ folder and look for Program Files folder.
If you only see the Program Files and no ProgramFiles(x86) Then you are using 32 bit Wine Prefix. If you see both then you are using 64 Bit Wine Prefix.
Hope this helps !!
Best Answer
To create a 32-bit WINE prefix on a 64-bit Ubuntu system, you need to open a terminal and run the following command:
WINEPREFIX
is the directory for the prefix