I just read the blog and have exactly the same problem using a sony vaio as well. I posted about it a little while ago
https://www.mobileread.com/forums/showthread.php?t=12172) but simply bypassed the problem by using libprs500 at the time I assumed it was because I use a Spanish OS. I have never used the connect program and it hasn't hindered me much. The problem I have is that without connect I don't know how to update the firmware. I'd like to get it working but don't know where to start.
p.s. my opinion of the reader is that it is on a par with sliced bread, although this may be considered excesive by some.