PaperCut NG and PaperCutChargeBack license are supplied as a digitally signed file (a file with a name like PaperCutXXXX.license). This file needs to imported into the application (available from the appropriate Download section on our website) via the About page. This procedure is documented in detail at:
This release contains an updated Java version which no longer supports 32-bit workstations. If you have any 32-bit users launching the User Client or Release Station from a network share, see this Knowledge Base article for more information.