How do I reset RPC thumbnails in Windows Explorer?

You can reset your RPC files in Windows Explorer if they no longer display the RPC preview.

To reset the RPC file preview in Windows you need to edit your Windows registry. Please follow these steps:
  1. Open Registry editor
  2. Find Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.rpc\UserChoice folder
  3. Delete UserChoice folder