SQL Assistant upgrade causing heartburn!

This may seem like a trivial matter, and it certainly doeesn't prevent me from doing my job, but I thought I'd ask anyway.  I was recently upgraded from my super old and comfy version of SQL Assistant to V 13.11.  Since the upgrade, when I paste my code into the query window, the scoll button on my mouse no longer functions.  I never realized how often I use it to scroll down the code until I couldn't anymore, and I find it really irritating.  
Can anyone offer a suggestion to turn that sucker back on?
 
Thanks!