Mouse won't click!

This is driving me crazy. I have a wireless bluetooth mouse made by Rocketfish. It won't left-click, but the right-click works for some things. To me it seems like the right-click has taken some of the functions that the left-click used to do. I can select menu items, but I can not click any buttons. So here is the situation.

From the login screen I can r/c and select my profile.

Type in my password and hit enter. That gets me into the desktop.

Immediately I get a message telling me about my computer haveing been restarted after an unexpected shutdown and a iCal notification about an appointment last week. I can't do anything with either of these windows. They don't seem to function like normal windows, so close all doesn't work. The only way to close them is to click the button in the window which I can't do.

So now I am trying to reset the mouse or look at help topics using the combination of the mouse and keyboard, but any window that pops up is hidden by these other two windows, and I can't see what I need to see. Nor can I click on any of the options.

I've changed the mouse with a USB mouse, and even used the mouse off my PC. All do the same.

I tried booting in safe mose, but that didn't fix the problem.

I read somewhere about booting from the disk, but I don't know how to do that. Also someone suggested restarting the disk utilities or something. When I tried that, I got to the point where I needed to click the button and could go no farther.

I have a sneaking suspicion my 11 year old was playing with something she shouldn't have like the universal access stuff, but she won't admit it and I don't know how to fix it.

I'm an old PC user, so if you guys have an idea how to fix it, please be gentle with the mac-lingo. Also keep in mind I can't click on anything, so keyboard shortcuts are a must.

Thank you for your help.