I do apologize if this has already been answered, but after searching through the thread (at least with the search function with stuff like tile, Cave Story+ (doesn't recognize the + for some reason), map, stage, etc.), and even tried to Google the following problem, I'll assume it hasn't come up, yet.
I want to mess about and try to edit the levels in Cave Story+ (on Steam), so I've looked for Level Editors like Cave Editor (which crashes upon loading the .exe file) and, well, Booster's Lab! There seems to be a lot of stuff that I can experiment with, which is a nice start. However, there is one problem. When I load up a map from the stage.tbl file...
Everything is a horrifying mess.
And this applies to
every single map. Obviously something that's not supposed to happen, but when I heard other people mention Cave Story+ and nothing about having something like this, that worries me.
I had the Booster's Lab as a folder within the game folder (since I assume the game doesn't detect it and it's just a handy-dandy shortcut for file navigation with the program), and then I tried to move it to the Desktop; neither fixed the problem.
I hope this isn't a very rare unsolvable case.