Issues Tagtool SE saving and loading decks

Hi there support
Im having alot of issues with Tagtool SE.
Re-loading and saving
It is taking ages for a saved drawings to load from a deck.
But I still have a lot of memory avaibale on ipad
Re-Image sizing
I saved a drawing and it shrunk it even though the canvas size is set to 3840 x 2160.
I cant work out how to resize it back to original?
Re-Importing
How do I re-import decks / drawings from dropbox or icloud to ipad
App seems glitchy
Should I delete and reload the app?