Upgrade software on PCSGU250, need uninstall first?

I have PCLab2000LT software version 1.09 on my PC and would like to update it to the new version 1.11. I have tried a few times (everything seems to go well) but even the newly installed desktop shortcut takes me to the 1.09 version. Should I uninstall the previous version first?

That would be best

Thanks!