Notes about the FMS file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The FMS file type is primarily associated with '1-2-3' by IBM. (associated with .WK1 or .WK3 file) This was a Lotus product. Lotus was bought out by IBM.