Notes about the SEM 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 SEM file type is primarily associated with 'Alpha Five' by Alpha Software, Inc.. Stores additional set objects such as layouts (forms, browses, etc.), report designs, and saved operations in memo format.