If I double-click an AUP file in Windows 10, it will open the project, unless there is already an instance of Audacity running.
I have to go in to Audacity and do File Open and (once again) navigate to the folder that Explorer already has open.
Not sure if this one is an easy fix…
Audacity doesn’t like running multiple instances. You can open multiple Audacity widows within the same instance. You can get crossed up if Audacity thinks it’s supposed to maintain UNDO for the show you’re trying to open in a different window.
Just because you have an empty window doesn’t mean it’s just loafing.
Koz
You don’t say what version of Audacity you are using (see the pink panel at the top of the page) but Audacity 2.1.3 should open subsequent projects in a new window in the same Audacity instance, as long as they are different projects than are already open. Downloads: Audacity ® | Download for Windows.
Gale