Shellbag Analyzer & Cleaner

You can delete the Registry keys according to Microsoft to reset the settings for all folders:

HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\BagsHKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\BagMRUHKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\BagsHKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\BagMRUHKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRUHKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags

On 64-bit systems additionally:

HKEY_CURRENT_USER\Software\Classes\Wow6432Node\Local Settings\Software\Microsoft\Windows\Shell\BagsHKEY_CURRENT_USER\Software\Classes\Wow6432Node\Local Settings\Software\Microsoft\Windows\Shell\BagMRU

Afterwards, re-create the following keys:

HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRUHKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags

On 64-bit systems additionally:

HKEY_CURRENT_USER\Software\Classes\Wow6432Node\Local Settings\Software\Microsoft\Windows\Shell\BagsHKEY_CURRENT_USER\Software\Classes\Wow6432Node\Local Settings\Software\Microsoft\Windows\Shell\BagMRU