Source Filmmaker version 0.9.8.7 has been released. This update will be applied automatically when your Steam client is restarted. The major changes include:

• fixed missing assets in portal2_dlc1 and portal2_dlc2 (ie extracted them from their vpks)
  
• changed usermod/gameinfo.txt to only contain the base set of search paths, to improve perf
  
• running the SFM from usermod with other mods not in your search paths now pops up a warning the first time
  
• added Edit Search Paths For Selected Mod to SDKLauncher, to make it easier to add/remove/reorder search paths