If the key is lost, the most reliable path is to contact the hardware manufacturer (the brand of your UPS) rather than the software developer directly, as the license is often tied to the specific hardware bundle. Version Compatibility:

He turned the case over. The sticker was gone—ripped away, leaving only a rectangular patch of grey adhesive. He checked the manual. Nothing. He checked the inside of the sleeve. Blank.

: It is often included within the user manual documentation provided in the UPS box.