Is there any way to stop Media Encoder creating this launch preventing file?
Solution presented at https://forums.adobe.com/thread/1268390:


  Open the file (C:\Program Files (x86)\Common
  Files\Adobe\SLCache\X19zbGNfZmVhdHVyZXNfXw==.slc) in any text editor,
  delete all of the contents, save it, and set the file to read-only.