It's happened again. Another user has been bitten by this poor design. See my earlier thread over in the Logos 4 forum about this, and the latest user to walk into this landmine.
Please redesign how collections work, so that it doesn't automatically open the first collection in your list when you got to "Tools | Collections" but rather you have to specifically choose to open one, so that you can't accidentally wipe out one you'd created. Also ask for a confirmation of saving when you close the collection, and ask for the name of it then. The way it works now is backwards from all Windows apps and it's very confusing to new Logos users.