-a- yes computers behaves strange
-b- can you be more detailed about the used export settings,
( like this time there is no JAVA subdir to see in your export )
-c- how you end up under desktop ( if i understand you file manager picture correct )
show your preferences settings for sketch path
did you “save as” the “new” project first correctly
-d- i urged you not use fullscreen,
because then you can see the terminal window with the “console” printout.
can you show us that one? see the start?, any errors? …
also pls. read