I wonder if uninstalling the previous version is that important that it should be given it own installation page and that WarpIn should be mentioned to do the uninstaall.
Yes, uninstallation should only be necessary, if previously installed files have to be uninstalled. IMO that applies for the system DLLs. Therefore I've added that paragraph on the first page, but it doesn't require an own installation page. You're right, it should be mentioned that, for uninstallation, WarpIN has to be be started. I'll add that.
BTW: The correct case for the name of the installer is: WarpIN.