i think it was left after separating on 64 and 32 folders
Spoiler :
***** 20.08.2016 19:08:39 - SESSION OPENED *****
***** INFO : WinReducer --> EX-81 [v1.5.2.0 (x64)]
INFO : "ISO" folder path has been successfully changed to : "C:\WinReducerEX81_x64\WORK\ISO"
INFO : "MOUNT" folder path has been successfully changed to : "C:\WinReducerEX81_x64\WORK\MOUNT"
WARNING : "Theme Configuration File" doesn't exist ==> "Performance Mode" has been activated !
INFO : Mounting -----> START = 20.08.2016 19:17:15
INFO : Mounting -----> START = ISO Mode [en_windows_8.1_pro_vl_with_update_x64_dvd_6050880.iso]
INFO : Mounting -----> FINISH = 20.08.2016 19:18:19
INFO : Configuring --> START = 20.08.2016 20:02:39
INFO : Configuring --> START = Windows Edition [Windows 8.1 Pro (x64) (en-US)]
INFO : Configuring --> START = Windows Build [6.3.9600.17415 (winblue_r4.141028-1500)]
INFO : Configuring --> START = Preset File Loaded [WinReducerEX81_test]
INFO : Configuring --> START = CPU Thread(s) [4]
INFO : Configuring --> START = Removing Speed Profile [Default]
ERROR : 20.08.2016 20:02:55 ==> Integrate - Updates (Windows Updates) : Unable to locate "C:\WinReducerEX81\WORK\INTEGRATE\UPDATES\x64\Updates"
ERROR : 20.08.2016 20:02:55 ==> Integrate - Updates (IE11) : Unable to locate "C:\WinReducerEX81\WORK\INTEGRATE\UPDATES\x64\IE11"
ERROR : 20.08.2016 20:04:12 ==> EXPERT - WinSXS Folder Cleanup (boot.wim)
ERROR : 20.08.2016 20:18:20 ==> Diagnostic Policy Services
INFO : Configuring --> FINISH = 20.08.2016 20:19:44
INFO : Exporting -> START = 20.08.2016 20:19:44
INFO : Exporting -> START = ISO Mode [C:\\WinReducerEX81_UEFI.iso]
INFO : Exporting -> FINISH = 20.08.2016 20:21:09
***** 20.08.2016 20:21:13 - SESSION CLOSED *****
***** INFO : WinReducer --> EX-81 [v1.5.2.0 (x64)]
INFO : "ISO" folder path has been successfully changed to : "C:\WinReducerEX81_x64\WORK\ISO"
INFO : "MOUNT" folder path has been successfully changed to : "C:\WinReducerEX81_x64\WORK\MOUNT"
WARNING : "Theme Configuration File" doesn't exist ==> "Performance Mode" has been activated !
INFO : Mounting -----> START = 20.08.2016 19:17:15
INFO : Mounting -----> START = ISO Mode [en_windows_8.1_pro_vl_with_update_x64_dvd_6050880.iso]
INFO : Mounting -----> FINISH = 20.08.2016 19:18:19
INFO : Configuring --> START = 20.08.2016 20:02:39
INFO : Configuring --> START = Windows Edition [Windows 8.1 Pro (x64) (en-US)]
INFO : Configuring --> START = Windows Build [6.3.9600.17415 (winblue_r4.141028-1500)]
INFO : Configuring --> START = Preset File Loaded [WinReducerEX81_test]
INFO : Configuring --> START = CPU Thread(s) [4]
INFO : Configuring --> START = Removing Speed Profile [Default]
ERROR : 20.08.2016 20:02:55 ==> Integrate - Updates (Windows Updates) : Unable to locate "C:\WinReducerEX81\WORK\INTEGRATE\UPDATES\x64\Updates"
ERROR : 20.08.2016 20:02:55 ==> Integrate - Updates (IE11) : Unable to locate "C:\WinReducerEX81\WORK\INTEGRATE\UPDATES\x64\IE11"
ERROR : 20.08.2016 20:04:12 ==> EXPERT - WinSXS Folder Cleanup (boot.wim)
ERROR : 20.08.2016 20:18:20 ==> Diagnostic Policy Services
INFO : Configuring --> FINISH = 20.08.2016 20:19:44
INFO : Exporting -> START = 20.08.2016 20:19:44
INFO : Exporting -> START = ISO Mode [C:\\WinReducerEX81_UEFI.iso]
INFO : Exporting -> FINISH = 20.08.2016 20:21:09
***** 20.08.2016 20:21:13 - SESSION CLOSED *****