I'd suggest you start with a clean fresh configuration:
Quit qtractor if it's running;
locate the user's configuration file: should be found under home directory, in ~/.config/rncbc.org/Qtractor.conf ;
remove, or better yet, rename it to something else eg. from the command line: mv -vf ~/.config/rncbc.org/Qtractor.conf ~/.config/rncbc.org/Qtractor.conf.BACKUP ;
launch qtractor again and check in your preferences again, on the View > Options... dialog.
You should know by now that the OK button gets lit and enabled if aand only if you change a setting, any setting, and only if the change(s) are valid to proceed; the scratch configuration above is kind of a radical move, only about to dismiss on any old setting still lurking there from ancient versions of the program.
I'd suggest you start with a clean fresh configuration:
~/.config/rncbc.org/Qtractor.conf
;mv -vf ~/.config/rncbc.org/Qtractor.conf ~/.config/rncbc.org/Qtractor.conf.BACKUP
;You should know by now that the OK button gets lit and enabled if aand only if you change a setting, any setting, and only if the change(s) are valid to proceed; the scratch configuration above is kind of a radical move, only about to dismiss on any old setting still lurking there from ancient versions of the program.
hth.
cheers