I used to have the "wheel mode shift" button set to change pointer speed. It seems that functionality has been totally removed with Options+.

PUT. IT. BACK!

Stop ******* with **** that people use! I loved this mouse when I got it. The Options software was a little finicky, but it worked for the most part and I rarely had "programming" issues like I'd had with previous Logitech mice.
Now, with Options+, it's all gone to ****. This is a half-finish product and should not have been released. I want to use the original Options app, but there doesn't seem to be a way to downgrade and I don't have the time or energy to write down (or find the file that has) all of my settings.
This sucks!