Error in Netgore Editor
When I try to auto update the grh, I get "Attempted to read or write protected memory. This is often an indication that other memory is corrupt." with the line get { return sfImage_GetWidth(This); } in image.cs . When I run it as an exe I just get a app crash. Now, I'm a learning noob, so go easy on me 
I believe I had gotten something like this to appear with NetGore 0.3.6 as well. Not sure if it's the same error but there are definitely some issues with the AutoUpdater, at least in 0.3.6.
I know I have seen that error before, but can't remember the history of it. Don't remember it being a problem in the latest release, though.
Yeah same, I can remember seeing it a long time back, but I really can't remember why. Might've been something to do with a few unsupported png features (old sfml issue I think), or deleting files... or something, I'm really not sure 
Only advice I can give is to make sure you're using the latest SVN version without a way to reproduce the problem if it happens again
Try batch loading & saving the images.
Resolved, just deleted and reinstalled.