As far as I remember, there is a discussion and links to posts on how to get the library back buried in the thread about allmine as well
https://www.mobileread.com/forums/sho...d.php?t=174641
Maybe this will give you another angle ...unfortunately when I did this is so long ago that I do not recall the detailed steps, all I can tell you is that it is definitely possible to get everything to work for the EE (apps on the sdcard, working library and google playstore access) .
Good luck !