Hi everyone , i'm a student from Vietnam , I've been using Xlaunchpad for 1 year , it's really great ,not only useful but also very cool , what it does is not so innovative , but the way it does is really awesome, thanks a lot to the authors of this program

But recently i'm having this annoying problem : when i roll the middle mouse wheel to turn from page to page , normally it runs very smooth ,love that , but then one day, suddenly it became quite slow , feels like lag, functionally it's not so important , it still works fine, but about appearance it's really really bad .
I think those who's using it all love the experiences it brings , to me that problem is unacceptable , i tried to fix with all the options in Setting, still nothing changes . I also checked the OS, i'm using windows 8.1 64 bit , nothing seems to be the problem here . I also tried to search on google and couldn't find how to fix it. Later , i have some problem with XAMPP additionally , so i decided to reinstall the OS, it took me ~ 1 day to set up all the programs i use for work .After that Xlaunchpad runs normally back, that really makes me happy. But then now, after ~ 2 weeks , today , after a few hours using Google Chrome i realize that problem came back , that's so terrible .
So now i'm writing this , hope that you can help me to fix this problem without reinstall everything

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thank you so much , and sorry for my poor English.