Do not take the period out of the filename. You don't even need to see the file. Open the rar and you'll see a blank folder. Go to add file in iTunes. When the "open dialog" pops up switch to browsing by columns. Browse into the folder with the invisible file. Hit COMMand+shift+period and the hidden file will show. Select it and iTunes will probably ask you to overwrite the old file. Also make sure your saving it into the root and didn't accidentally select a folder. I did it for the first time today after the update and it worked great. I'm an iOS developer of you need me to screw share how I did it PM me and I'll walk you through it.