Please check garmindevice.xml for 3.80 version of SW. It has two occurrence in this file:

<SoftwareVersion>XXX</SoftwareVersion>

and

<UpdateFile><PartNumber>006-B1603-00</PartNumber><Version><Major>X</Major><Minor>XX</Minor></Version><Path>.System</Path><FileName>GUPDATE.GCD</FileName></UpdateFile>