I've just copied an existing, working XC8 1.12 project to a new directory, removed some project files and renamed the project (as a way to begin a new project). A compile attempt yields "No valid installed HI-TECH compiler drivers". I've checked language toolsuite and am surprised that when I choose XC8 the path C:\Program Files\HI-TECH Software\PICC\9.83\bin\picc.exe appears. Of course I ammended that and also the paths under the expandable view in language Tool locations, but no gain.
I'm making a second attempt, copying the old project and compiling then gradually removing files and that is working so far.
I don't understand what's happening though.