Toby, over at 'Cheat', has just reinstalled MatchLight IMS on his Mac running Sierra OS.
He ran into an issue with the license, and was unable to install it into the program folder, so needed to alter the Environment Variable to point to a different location.

After a bit of searching he found this command to change the directory to the 'Resources' folder.

launchctl setenv MATCHLIGHT_LIC_PATH //Applications/matchLight.app/Contents/Resources/

Hopefully that may be of help for other users.

Steve

Another potential requirement is the need to disable SIP to access the USR directory on the internal drive.
See: https://www.imore.com/el-capitan-system-integrity-protection-helps-keep-malware-away

Steve