Notes about the EX1 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 EX1 file type is primarily associated with 'Renamed .EXE File'. Some people will rename a .EXE file to .EX1 in order to send it via some E-mail systems that block .EXE files by default. On receipt the receiver must rename the file to .EXE in order to run the program. (Various other extensions could be used to do the same thing so long as both parties know what the file really is and can rename the file.)