Skitch starts and runs normally but after screen capture, the Skitch program slows to a crawl and the mouse cursor disappears when trying to annotate. The program still "works" but is very difficult to use. I am using Version 2.8.2 (264830) on MacOS High Sierra Version 10.13.6. This only seems to happen on my new LG5k monitor at 2560x1440. Annotating works correctly on my laptop screen without issue. Could it be some sort of caching issue? Is there a way to clean out the app? I don't use the helper and always completely exit the program.