SetL, will only show in the enviroment in which it was created (Set Local), if you need it to be available for the entire system you need to use SetM (Set Machine).
If you need to set this everywhere and make it permenant on all machine, then look at adding it to the registry, and then you can just check to make sure it exists and if it does not, create it.
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Today is the tomorrow you worried about yesterday.
