Re: Problem when software changes hands
ES File Explorer is a bit of a "special" case. The free edition is utter crap, laden with adware and dark pattern user interface nonsense.
The paid version is actually very good, and strips all of that out.
It's a prime example of "you get what you pay for," and I actually understand the approach to an extent, but the distance they've gone to degrade the user experience in the free version is so off-putting that I can't see them getting many sales of the paid version any more. It's a real shame.
I had the paid version before it all went south, so continue using it, but my wife has (had) the free version installed and it made my eyes bleed every time I tried to use it.
Since it is by far the best file manager I've tried (with excellent support for network drives and chromecast, very good native image viewer, and other features which I've not found elsewhere), I've continued using the paid version.