I experienced the same problem on Windows 7. The logs print an error message for every file, stating that the target file already exists. The app seems to be creating an empty directory with the same name as the target filename. Since the directory is created first, the copies all fail. Since I tried different variants of the rename format, my dlc tree is now cluttered with thousands of empty directories. Easy to script the cleanup, but very annoying. Another odd bug here is that unless you open the log window first, the progress bar jumps to 100% green very quickly, while in reality the renaming process is still running in the background. Unless you open the log window, the app gives no indication that an error has occurred. Here's an example directory listing (note, this is a windows machine, I just used cygwin to list the contents as it's easier and provides more data). OS: Windows 7 Home Premium SP1 .NET Framework version: 4.5.2 CFSM version: 1.1.0.0 $ pwd/cygdrive/d/Steam/steamapps/common/Rocksmith2014/dlc $ ls -la Pearl\ Jam/total 37616drwxrwx---+ 1 bob None 0 Nov 7 14:06 .drwxrwx---+ 1 bob None 0 Nov 8 14:48 ..drwxrwx---+ 1 bob None 0 Nov 7 14:01 Alone_Lost Dogs_E Standard_NA__DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:06 Alone_LostDogs_EStandard_NA__DD_p.psarc-rwxrwx---+ 1 bob None 3947834 Mar 8 2015 AloneLostDogsNAEStandard_DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:01 Animal_Vs._E Standard_NA__DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:06 Animal_Vs._EStandard_NA__DD_p.psarc-rwxrwx---+ 1 bob None 3704629 Dec 6 2014 AnimalVs.NAEStandard_DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:01 Better Man_Vitalogy_E Standard_NA__DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:06 BetterMan_Vitalogy_EStandard_NA__DD_p.psarc-rwxrwx---+ 1 bob None 5469092 Mar 8 2015 BetterManVitalogyNAEStandard_DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:01 Daughter_Vs._E Standard_NA__p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:06 Daughter_Vs._EStandard_NA__p.psarc-rwxrwx---+ 1 bob None 4891849 Jul 11 12:02 DaughterVs.NAEStandard_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:01 Dissident_Vs._E Standard_NA__DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:06 Dissident_Vs._EStandard_NA__DD_p.psarc-rwxrwx---+ 1 bob None 3940771 Dec 6 2014 DissidentVs.NAEStandard_DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:01 Even Flow_Ten_E Standard_NA__DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:06 EvenFlow_Ten_EStandard_NA__DD_p.psarc-rwxrwx---+ 1 bob None 11156956 Jul 11 12:02 EvenFlowTenNAEStandard_DD_p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:01 Yellow Ledbetter_Rearviewmirror (greatest hits 1991-2003) (Disc 2)_E Standard_NA__p.psarcdrwxrwx---+ 1 bob None 0 Nov 7 14:06 YellowLedbetter_Rearviewmirror(greatesthits1991-2003)(Disc2)_EStandard_NA__p.psarc-rwxrwx---+ 1 bob None 5041503 Jul 11 12:02 YellowLedbetterRearviewmirror(greatesthits1991-2003)(Disc2)NAEStandard_p.psarc