I have the same problem already reported to boonex support together with screenshots. They say unbelievable but I found the problem.
The reason is that ray admin area is writing wrong entries to main.xml files in ray widgets - maybe a mailfunction in license checking procedures.
To get ray widgets to work I editet main.xml files in ray widgets and changed the entry "not registered" to "enabled". It works as a short time solution only because as soon you go the admin area see more of ray entries in main.xml are changing to "not registered" again.
The reason is that ray admin area is writing wrong entries to main.xml files in ray widgets - maybe a mailfunction in license checking procedures.
To get ray widgets to work I editet main.xml files in ray widgets and changed the entry "not registered" to "enabled". It works as a short time solution only because as soon you go the admin area see more