I have a 24" widescreen monitor. Ver 1.51 ran on widescreen (not fullscreen) but 1.52 is opening on fullscreen. How do I get back to widescreen?

EDIT: looks like it's a bug with the latest GOG patched version? see below post.
www.gog.com/forum/master_of_magic/master_of_magic_dosbox_tweak_master_guide/post8

there should another config file in your installation, that doesn't get updated when you use GOG's setup prog.

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doesn't the GOG version come with a SETUP program for all DOSBoxed games? run that and choose the res you like.

otherwise you can just install your own separate DOSBox and change the config file for that to run at whatever windowed res you like. then use your own DOSBox to run the EXE from the GOG installation.

Alternately, if there's a problem with the install then you could do what you are supposed to do and open a ticket and tell them what's wrong so they can fix it.