Interactive Flat PanelsMissing user buttons ActivePrimary
#3680
Anonymous
Inactive

In addition, if the above doesn’t fix the issue, there is also an additional path here: 
C:Documents and Settings<user>My DocumentsActiv SoftwareActivInspireMy ResourcesMy Profiles

Rename the “My Profiles” folder and restart ActivInspire. 

Failing that, we might have to do a clean installation, but given the fact it’s happening on multiple machines. the profiles would be the logical place to start.