I think ts beta 19 is not recognizing 3.2.1 gslender v5 again.
It has not changed. Is there a new version of this with a new signature?
Why don't you only use MS2E?
The available loggers has been steady for a while, but did change with versions. Currently all it needs is to start with:
"MS2Extra 3" and it is good... That seems easy enough and TS knows it is version 3 or better.
James' suggestion is really the the right one, but there haven't been too many other firmwares other than this one to drive the need. Compiling the signature match in also helps prevent theft of the firmware where people recompile the firmware with their own signature and call it their own.