I've opened the program now. So far, it's extremely intuitive and easy to use. That tab where it lists out all the attachments is a godsend, exactly what I was asking for in another thread.
Few minor glitches I've run into so far.
One, on the Nations tab, the search bar has a drop down list that always stays open and can't collapse. It'd be nice if that would collapse when you haven't typed anything to take up less screen space on the side tab.
One of the few things I haven't been able to find is an option to rename the existing factions (i.e. if I want to make the Russians into the Soviets instead). Otherwise you'd just have to delete and recreate them from scratch, which is more of a hassle than it's worth.
When I tried adding Canada as a nation for an experiment, it defaults to checking every single territory added to the country as a capital territory, which is annoying. Should default to off instead. Also, after unchecking capital and switching to another territory, it rechecks the capital box again. Haven't found a way to make changing that stick yet.
It also throws up that ! error marker by "Mark each nation's capital" in the steps to a playable map section on the home tab if you have factions like the Chinese, Dutch, Mongolians, etc. on the existing maps that don't use a capital. It probably has no effect on whether you can save and export a file successfully, but perhaps there could be a checkbox option for "no capital" on the country tab's that just tells the editor's engine that the absence is intentional and not an oversight, and has it stop pinging that as an error.