Yeah, I use 4.7.4 and never do that. I just select the BLUS on the path select drop down menu, and then Decrypt PFD - Decrypt All Files - click Yes. Then, after editing, Encrypt PFD - Encrypt Decrypted Files. That's all I ever do in BF 4.7.4. I also leave BF open while editing. Not sure if it helps anything, but I find it convenient.