I just started using uMake today on my new iPad Pro 12 and there seems to be some UI problems with the file management bar at the bottom.
It looks like you mean the bottom ribbon to move up and down to reveal a bar with things such as “delete” when you click the ‘edit’ button to enter that mode.
However, on this device, it seems to be inverted in behavior. It’s raised out of the way before you hit the edit button. Then, it slides down to cover the new bar when you did hit ‘edit’. I can actually watch the new bar with the buttons rise from the bottom and get covered by the existing bar as it drops down to cover it.
If I instead move to one of the other pages, such as ‘learn’, the bar is actually visibly raised too high.
I took screen shots and tried to upload them on this post. However it will only allow me to post one. Hopefully one is enough to illustrate.