Okay...I was searching the forums and found the member "cancan" who had same problem as me..he deleted the file koboreader.sqlite and reset to factory settings..it deleted the "free" books which I didn't want anyway..followed rest of his advise
https://www.mobileread.com/forums/showthread.php?t=88957
and I am now just using adobe as my software and it works!!
Thanks cancan!!