Obfuscated rar files were and still are NOT immediately renamed as they are d/l. This behavior IS DIFFERENT than it is in v6.42.
Yes, it's different. The issue is restarting the download when you exit and restart Newsbin. If I rename immediately like I used to, the files will be completely re-downloaded on restart. Deferring the rename means on restart I can just re-check the downloaded files and not re-download. Rename is now part of the repair process. Like it is in Quickpar.
I think "misinterpret" is a good way to describe this. You saw changes that you thought were related to the added hex number but, they were unrelated. It's just so happened that multiple changes happened at once and you thought they were connected. It's not that you're wrong about the changes, just that the HEX number wasn't the trigger for the changes.
So, the hex number is a wild goose chase, your real issue is:
1 - The rename is now deferred to repair time.
2 - You're not seeing the renamed files go to the recycle bin.
I explained #1. It's how it works now. #2, I'll have to look at. I've got no other reports of it but, it's not likely something I've checked directly. I don't download obscured files most of the time so, I'll have to dig one up. If you want to PM me the subject of one that gets renamed in the PAR process, I'll try it.