Alex's case as been solved by the 18th of August, through the usual Tech Support channel.
I assume I should have closed the topic, as well as numerous others... but unfortunately I've stronger priorities, as helping my colleagues purging the "B1G1F" offer mail queue for instance...

Concerning your case, the problem might come from conflicting versions of the Syncrosoft License Control Center.
Please follow these simple steps:
1. unplug any dongle, close any application;
2. download and install the latest LCC update:
==>
http://www.syncrosoft.com/License_Control_Center-78-11.html3. plug your dongle(s) directly to the machine, not through any USB hub;
4. launch the LCC and check all your licenses are shown and activated, et voilą!