Browser asks me to download the game

Hey guys, I'm not really sure if this is the correct thread but I have a few questions about this. I just got a new notebook (HP probook 4525s) and I just xfered maple files via an external hardrive and everytime I try to start maple via the web it asks me if I want to redownload the game again. What should I do? I can start the game via gamelauncher tho, but it's really annoying to login everytime you want to chance chars or just xfer stuff. Is there a fix for that? Thank you very much, every help is apreciated.