No prob Jeff, that's why we are here. Actually I had reviewed this App (Chordle) awhile back, and found it lacking in much the same areas that you have noticed (and mentioned). I wandered back there just a few minutes ago to the Windows Store and there have been a few "fixes" since the last time I installed it on my PC.... especially in ChoPro handling/importing and such. But TBH it's not one of our projects and really can't do much to change what it is..... even though they have listed us as one of their primary sources for music (without even doing us the courtesy of asking BTW). Here we are just a bunch of fairly "casual" musicians trying to help folks find the music they want to learn, encourage them along the way, and promote individual expression through Prose, Lyric, Music, or any combination of those. There is some degree of editing that can be done within individual songbooks, we don't host or store the actual music, just the formatting and preferences of each member as they have "modified" a tune to their instrument, tuning , key or taste.
That kinda means that there is no way for you to drag and drop your stuff into here and make changes and have them be returned with those changes intact. We are not that big an outfit for having rooms of servers and the legal staff to deal with all the copyright stuff that could happen.... LOL. Guess that's why there are no fees, or anything to download to become a member of the Chordie Community..... which BTW Welcome To !!
There's about a half Million of us out there, and just maybe someone will have an idea of a different App out there that more closely fills your needs. You did a good job of describing what you would like and that is always helpful. So stick around, wander down to the Chat Corner and introduce yourself, there are a great bunch of folks who would like to say Howdy.
"what is this quintessence of dust?" - Shakespeare