Windows RL, detect new JAR with a shim class inside

I am confident I have seen this come up before, but my google-fu fails me.   So maybe someone rememebers.

 

I have a custom JAR, and in Linux RL's I just call the class by name.

Windows RL - File is in the lib directory with all the other shims, and I try to add a driver and my class is not in the list. 

How do you make the WIndows RL tool rescan and see the new class?  I remember seeing a thread on that topic but cannot find it.

I can edit the config file, specify the class, and it works.  But the settings in the gUI are still wrong, they are stored in the registry, so I could go edit that to be correct as well. But I want it to work properly.