Question: How do I turn off Maple's "smart" highlighting?

I'm using Maple 16 for OS X (on Lion). The way Maple handles highlighting is very strange; if I want to highlight (and copy or delete) part of an expression, or maybe something nested within a command, it frequently highlights things I don't want it to and never put my cursor near. I expect it's trying to be smart and predict what I want to select, but quite often it makes it impossible for me to do what I actually need to, causing even more hassle. Usually if I want to delete part of an expression, for example, I have to manually delete character by character because I can't highlight what I need to. Is there any way to turn off this "feature" and have Maple simply highlight like any text-editing program would?