This has just started and I am at a loss to figure it out. I have tried to vary project properties. Switching file types and characteristics. Seems to be related to rendering overhead (RAM maybe) . I can no longer import a bunch of files into a new project. Get the message "not responding" and VP app freezes. Tried to reassign prerender folder to external drive. My pc's stats look okay. More than 500GB of clear headroom and 8MB Ram always was plenty. Ideas? 5 files is a joke eh?