The solution is so much easier than writing a script.
I would send all the users an email with instructions.
1) Open JMP
2) Go to File->Preferences
3) Select File Locations
4) Select License File Path
5) Browse and select s:\data\license\jmp\15 (for example)
Then JMP would automatically pick up the new license file when the admin updated it in that one place, and none of the users would have to worry about anything.
JMP Systems Engineer, Health and Life Sciences (Pharma)