Hi
With Some trepidation and after much research I installed GO Launcher EX version 2.78 yesterday
along with "rotating wall paper" on my kindle Fire ver 6.22
Thankfully I have not had any problems!!.
I am NOT using any Custom third party themes For GL EX just the default one plus some Nice Dark wallpaper images ,nine in total, that I put in My "pictures" Folder and added to rotating wall papers .
I rarely, if ever, completely shut down my kindle as I use it Daily and simply charge it every night in Sleep mode.
I did do an Immediately complete restart to make sure it would start up correctly. After installing GL EX
I have the stock Amazon launcher app in my dock making me just one click away from retuning to the stock launcher.
I also have the actual Amazon Kindle book reading application there also.
tapping either one takes me right back to the book I was last reading on the book marked page.
I was very weary of installing GO Launcher EX after reading a few "bricked device" horror stories.
My kindle is nearly full ( 980 megs left)
I have a few decent games 2D& 3D
and 3 Gigs of Comic books from Dark hoarse, Marvel& DC that I have not read yet using the excellent comic reader mobi app
My Device tinkering period is over
My advice, if so inclined, is to get the latest NON beta Version from the GL developers web site( 2.78)
Dont rush to update it with every new build.. and
DONT "Root " your Device
Cheers
Anabran