Crashes in resource workshop

I use Borland Resource Workshop 4.5.

I find that the dialog editor crashes terribly frequently. This seems to
be associated with Borland custom bitmap controls.
It also seems to be associated with the 'preview' option, because when I
preview a particular dialog it crashes; but when I turn off the preview
and edit it, it does not.

The crash is a "Divide by zero" error, and causes the application to
terminate. My Borland IDE then says "There was an error in worklib1.dll.
Do you want to save your files?"

Has anyone else had a similar experience? What should I do?