Fortinet version 7.4

I have an older version Fortinet VPN/SSL client to connect to a client. When I add the current executable, I get an error ' Path not found'. The path is correct, but the executable file on the setup page is not the default executable on the setup page. I have checkedthe option to set the directory and filename, but I still get a Directory Not Found message.
Is this a supported version?
Any suggestions to setting the path and executable which have change names.