Oh dear, yes lots of problems it seems with the new sony software. I tried updating mine and couldn't even get it to download so I've left it for now!
Please have a look at Calibre which is excellent ereader software here that I use for my Sony ereader. It has its own forum here:
https://www.mobileread.com/forums/forumdisplay.php?f=166
Hope that helps you. P.S I've never actually used the sony software even though I have the old version installed!