12000XP firmware bluetooth procedure

Greets,

Looking for validation of my plan to update ol' 12000xp from ceaa-0202 to ceaa-0507 offline please.

12000xp currently exhibits seemingly random bouts of fast fan syndrome when solar power is connected. Internet connection not available. 

Finally figured out to logout from EG4 Monitor on Android to access Firnware Update. Downloaded two files consisting of ceaa-0507. 

The dongle serial number appears in my Bluetooth devices list and I am ready to pull the trigger to install the update via Bluetooth. 

I plan to put ol' 12000xp in standby first. 

Kindly validate my plan as we all know what happens when firmware updates go awry and it ain't pretty. 

Many thanks,