MacOS 10.13.6 on a 6,1 MacPro - Alfred has been used all day every day for a couple years. Recently, it does not find an installed app after invoked with control space - sees no installed apps at all. I suspect I've inadvertently changed a setting but can't figure out. I've tried ctrl-space, opt-space and cmd-space. I've purged its cache. For example, if I type 'word', expecting to see the MSWord app listed and ready to launch, I see Alfred preparing to launch Chrome and search for the word 'word'. A little help please . . .