I deployed an application using PB 2019 build 2082. When the user scrolls on a grid datawindow, the scrolling is very lagging but when I run the application on my PC (which has PB installed), there is now lag. Both PC's are up to date with Windows, Office and .Net updates.
Thank you. That was it. I saw that file in the runtime files but since I didn't change my theme, I didn't copy it.