First, to see what firmware you have, look in Settings/About eDGe. You should find your Android version (probably 1.6) and your Build number (probably Dingo something).
To get the Ermine update see this thread:
https://www.mobileread.com/forums/sho...d.php?t=134237. Or take a look at the official instructions:
https://www.entourageedge.com/suppor...barticleid=265.
If you have trouble, let us know.