Have you tried to right click and then open with, when that window opens look for blindwrite select it and then make sure use this application for these types of files is ticked. If you don't see Blindwrite in the window just browse to it.
Yep, I sure did do that. When I double click a .cue file Blindwrite is what loads up. It is set to the last file that I selected to burn instead of the file I just loaded...!!!????
It is weird. I don't know why.
Any other suggestions?