Comment 5 for bug 1628160

All files are in the project folder with the file * .pro.
I usually open the projects as follows:
1) Open KiCad
2) File -> Open Project(select folder -> open *.pro file)
3) Then I see the files in the project tree -> double click to open my *.sch

Every *.sch file is part of the same project.

Project usbasp(not my project, but folder contains * -cache.lib), which I sent scheme at the opening gives a warning(you saw screenshot), and other projects generally hang eeschema.