I'm glad that the main issue is resolved.
However, having non-ASCII characters like a cedilla in a User name or any folder path that SketchUp might want to access is a recipe for disaster.
On PCs the version of Ruby shipped with SketchUp is known to have issues with such strings in its File, Dir and IO operations [but MAC works OK, as do newer Ruby versions which are sadly unavailable for us to use via the current API].
So on a PC...
File.exist?("C:/Users/TIG/AppData/Local/Temp/Francois.dat")
will return false if it does not exist... AND true if it exists.
BUT with the cedilla in the path...
File.exist?("C:/Users/TIG/AppData/Local/Temp/François.dat")
will return false if it does not exist... BUT also false if it exists !!!
Which is pretty useless !
So be prepared that from time to time you might get illogical results from some Plugins...
An update of SketchUp's Ruby is long overdue... this fundamental issue with Ruby's old PC version is a pain...