1. Close Virto License Manager
2. Delete hidden lic file(s) from "c:\ProgramData\XHEO INC\SharedLicenses\" folder.
  * How to View System and Hidden Files in Windows http://support.microsoft.com/kb/141276/
3. Run Virto License Manager, you should see trial or error license status
4. Select product node and click Register Product link button, then activate the product again
5. Approve IIS restart