Garmin has started putting the next Firmware version number in the garmindevive.xml ready for the next update but I'm sure your device only had 7.80 installed before you (for example, patched).
Check your own garmindevice.xml

<PartNumber>006-B1562-00</PartNumber><Version><Major>7</Major><Minor>80</Minor></Version><Path>Garmin</Path><FileName>GUPDATE.GCD<

Spoiler: large image
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