I'm sorry to hear that, ali820. After reading your post I tried it again and it is still behaving the same for me as before: the attachment link that initially shows when I single-click a transaction in the register does not work, but once I open the transaction for editing, the link that is displayed there works.

I have had a running battle with the attachment feature. Now when I can't get it to work, I report the malfunction, make a folder to hold the files that I would have attached, and hope that the next month's update fixes it. I don't have hours to spend with QBO support when all they're going to do is tell me to clear my browser cache. I doubt the responders are even human.