Multiple Versions of SpyBot shown

I have SpyBot Professional Edition now, after using the free edition for over a year. Now, when I start SpyBot, it shows a pop-up stating I have 3 versions installed, along with the option to continue using the Professional edition. Once I click on that, it starts up and runs without further nags.

Is there some way I can permanently remove the 2 free editions of SpyBot that is detected? I'm running windows 8.1 - all updates done, on a Samsung RV515 PC (AMD Chip) with 6 GB RAM.