People with attaching problem's, completely download the new RB into a new folder dont over-right the exsisting RB folder, reboot your pc and it will work.
Similar issue.
I have dl'd the new release a couple of times now, rebooted a couple of times. I am deleting the old folder before unzipping the new one with winrar. Running everything as admin, once I click attach, I get a pop-up with: Error could not start bot.