Hello,
use Qt version 5.10.1
and I have installated software in computer.

Thanks !

When I open the file with .qet that I have done and saved, it always shows message "Unable to open project (The file U:/....... *.qet does not appear to be a QElectro Tech projet file. Thus it cannot be opened."  And closed ElectroTech...
How shall I do?
Waiting for respondr and Thanks very much !!!