Wacom tablet color problem

[PegoMan]

I have a new Wacom Intuos Pro and it was working fine until this morning. All of a sudden it began painting with the brush tool in the background color instead the foreground color. The mouse works correctly, but not the Wacom stylus. I'm sure I screwed up as a new used, but I can't find a setting to change. I did a chat with Wacom and that was less than hoped for. So I though what better source that the Gurus forum. I'm on a Mac desktop using OS X 10.12.6 and a Wacom PTH-451.

Any suggestions?

Thanks,
John

 

[PegoMan]

All corrected! I still don't know what I did wrong, but after reloading the drivers all is well.