I dislike the .tpsheet a great deal as there's nothing I use at all that uses this.
Unfortunately, most of this GUI is extremely low res.
Some of the basic stuff is still okay but honestly, this stuff looks like it was made for a 640x480 display.
If you're not using this in something like Unity with the 9-slice option in your GUI, you can pretty much count on needing to re-make a lot of the UI in Photoshop or something like that.
With how much 9-slice is needed, this should have been advertised as a Unity asset. I've spent a ridiculous amount of time creating 4x scale versions of these GUI frames.