Cleaning up sy_griddefinition.m4t

Has anyone come up with an easy way to clean up the sy_griddefintion.m4t?

I'm working with a client that has a 50 user count and they have been using Sage 100/MAS90 for at least 20 years.

Sy_griddefinition contains every rearrangement of data entry grids for every user/workstation combination from the beginning of time and the file contains nearly 90,000 records.  We have been having some issues with individual workstations not displaying information properly.   I've fought with this many times in the past and about the only way to get a handle on/make sense of the info out there is to export the file via crystal to an excel file and using the data sort/selection functionality to find what I want and then if I need to delete things to try to resolve the issues it still takes quite a bit of time to clean it up.  You don't appear to be able to use visual integrator on this file.

I've worked around some of this by either giving a user and new log in or renaming their workstation,  but it sure would be nice to just clean up all the old inactive users/workstations. I would love to just reinitialize the file but I know that there are generalized records that are not specific to a user or workstation so I don't think that would be an option.

Has anyone created a utility or come up with some nice way of this file?