full yoke
@limpid flax Looks like .flp files are no longer associated with your FL Studio install.
Not sure what caused it, but try right clicking the file, selecting "open with" then chose "more" and hit "always open with this application", then selecting FL Studio.
You can also set this in your system itself.
Alternatively, there's a way to do this in FL Studio itself.
Go to the general settings in the toolbar under: Settings > General.
In there, under "System" there's an option called:
Associate Project Files with this application
Make sure that's enabled in the FL Studio installation you want to use (preferably your latest install).