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Hello Agamemnon,
Welcome to our forum!
Sorry to hear of this problem. Please try to update your eLicenser Control Center and Vienna Instruments software. After a restart, everything should work again. Note that the ViennaKey with the license for the Special Edition Standard Library (which can only be downloaded once to your key) has of course be connected to your computer. Please avoid USB hubs, especially unpowered ones, as they can cause problems.
If the problem persists, please contact us with as many details as possible (Which version of Mac OS X? Which key are you using - key number? Is the red light illuminating on the key? Screenshots also always help) at .
Best,
Stefan