I think that FM sometimes stores the watch list from the data viewer somewhere. If you have a watched calc that is doing a task that will crash FM it can continue to happen until those files cleaned up. I would think a reinstall would help. Do you have a system log for why the crash happens?
FMS and FMP on the same machine is not always the best idea.
Was this a known bug? I cannot remember. Latest updates?
I have had this bug and it was because of something that the dataviewer was trying to display.
If you create a new table, and open the dataviewer so that nothing but the new table appears do you still crash? If it doesn't crash when you do that then perhaps submit a bug report.
Another question: does it make any difference whether you have the Dataviewer on the Current or Watch tab?
Bigtom's observation about calculations in your Watch list is the likely source of the problem. You could try opening FM only and check the Dataviewer with no file open. Delete or disable any calc that might be suspect, and see how you go.
+ 1 to bigtom
Try to reset your preferences.
In Windows registry it should be under
My Computer\HKEY_CURRENT_USER\Software\FileMaker\FileMaker Pro\
look for "Watch List" entry and delete it or clear the value.
Obviously, make sure you back up your registry before modifying it.
If it is due to a watched calculation, you might also have a buggy plug-in calculation in your watched list.
This could manifest even if you do not have any databases open.
Removing plug-ins should let you open up the Data Viewer again and delete the problematic calculation.