It seems that the art is to move your cursor until you see edge and corner points appear for the required shape. (top image) - when that occurs, left click and you 'should' find that you select the required item. This is indicated by the outlining as seen in the second image.
An exception may occur if you have flattened the objects - i.e. they are no longer individual shapes.
In terms of turning off the tool - I do the same as any tool in Snagit, which is to select the 'Selection Tool' top left. That seems to be the least intrusive.
Hope this helps
I don't consider it to be any sort of quirk. Just the way image editors work. For example, the 500 LB gorilla of the image editing world (Adobe Phototshop) operates in the exact same way. The main difference is that instead of SNAG, their format is PSD. ;)
Cheers... Rick :)
Rick - to clarify, I was not suggesting that the layering in Snagit is quirky, there are however various other quirks that you learn to work with or around. You also hope that TS will resolve them over time, but we'll see.
I'm not sure that TechSmith themselves would put Snagit up against the 800lb gorilla .. but at the level it works it manages layering and the like pretty well.
My overarching point was that Snagit is a fabulous tool, it's not perfect by any means .. but when you consider what you pay and what you get - there're few tools out there that provide a better return on the £ than Snagit ..