FlexLMseach v0.02,0.03,0.04,you are right.it will be better with possibility of a file extension choice.
in v 0.02:
Search for FLEXlm/FLEXnet signatures in files
*.exe, *.dll and in files with up to 2 other extensions
in current folder or in "base_dir" folder
and in all subfolders.
Usage: FlexLMsearch [-h] [-d xxx] [-e1 yyy [-e2 zzz]]
Options:
-h this message output.
-d xxx, xxx - a full path to search base folder.
-e1 yyy, yyy - a 3rd file type extension.
-e2 zzz, zzz - a 4th file type extension.
Example:
FlexLMsearch -h -d "C:\Program Files" -e1 .pyd