I am sorry.
If you remove this app from your computer, then all information including the license will be clean, so you have to enter these information again if you want to use it next time. If you already logged in before, then you do not need to enter these information again next time, but the advanced condition is that you do not re install it.
If you have no idea what your license is, you can contact us. We will help you find it back. Don't worry.
Please feel free to contact us if you need more help in the future.