Encounter the following error when launching Performer 5.5 under OS8: “Error while verifying your authorization. A previous attempt to expand this compressed software failed. Please restore from a backup. Your authorization count will not be affected.” This is a result of an incompatibility with Performer 5.5 and OS8 (or later). We recommend upgrading Performer versions to Performer 6 (or later) or Digital Performer 2.3 (or later).