Failed 9.5 install (no license found for viewdata040), ran Mentor Graphics SSD Test and Install HW Key Driver and it found the dongle. Ran Mentor_License_Utility and it failed to find the dongle. Removed and reinstalled the driver and it now finds the dongle. Still failed launch with the same error. Diagnostic report shows C:\flexlm\license.dat does NOT exist.
Ran Mentor_License_Utility and tried to install license from SupportNet and it did not show a Host ID at my site that matches my dongle. Downloaded a license.txt from Mentor Authorization Code site which did contain my dongle Host ID number. Still failed launch with the same error.
Ran Mentor_License_Utility and tried to install license from a file and selected the freshly downloaded license.txt and it reported: "No new licenses were installed and None or not applicable"
No idea what to try next.