If you are struggling to get LM90 running, consider these modern alternatives:
GE Fanuc 90-30 to Proficy Migration Guide - Industrial Monitor Direct
Get GX Developer or GX Works2 from Mitsubishi. Don’t risk LM90 from random zips.
Logic Master LM90 was the primary configuration tool for GE Fanuc’s 90-series controllers. It allowed engineers to: Create and edit ladder logic programs. Configure hardware modules and I/O. Monitor real-time PLC data. Force variables for troubleshooting.

