Looks like we have duplicate posts on this issue so I am not feeling so blond anymore! Smile!
Here is the other link: https://forums.lutron.com/showthread.php/3022-11-0-Inclusive-Upgrade-Will-Not-Communicate-With-Repeater
And I think I resolved my problem. Or at least I am so hoping so!
Finally after pulling some hair out & definite temper tantrums plus giving up for a few days (if I am honest - more like a week) - I got this process to work on my programming computer.
Restart your computer <<Only do this with nothing else running>>
Turn off your firewall
Direct connect the main to your laptop
In the design tab - click find main repeater
You will need to update your IP
I used enabled DHCP
Click save (be patient some took 5-6 tries before saving).
Click close
Go & do a transfer
And firmware should update with out issue.
Once I did this - the file that I was working on (which said the Main firmware was 10.6 but the transfer was always unsuccessful) - said the firmware was 9.2 and did the update. Super odd. Not sure what happened or if I put the main into safe mode accidentally. But this happened on 10 of 12 repeaters I tried to update. I will go back and do them all direct connect now to get them to 11.0. And hope this is resolved going forward.
As a side note - I had to restart my computer each time I went to update another repeater. The software would absolutely not find another main after I did 1 successful firmware update. Might work just restarting the software but my patience was shot at that point.
I've been doing RA2 since 2011 and never had this issue before. Glad I didn't start on this version or I would have totally given up. Hope this helps!
And Huge Sign of Relief that I am back up and running.
Cross your fingers on the dual repeater system update I have to do this week!