I customized the form for all companies and it's in MAS_SYSTEM\REPORTS. Once customized, you can just type the form name in Check Maintenance, but when I do it in this company, it just blanks out. I also removed the form from SY_lastformUsed, but it just gets written back the next time I access Check Printing and type in the form code.
I even copied the form code to that company via Report Manager, thinking it would use it since it was company specific, but no... just blanks out again. Happens on all PC's for that company. Weird. So, thus far we have SY_LastFormUsed and SY_ReportSettings. Anywhere else?