The uninstallation of the bootmanager BootStar is as easy as the installation: Just start the program BSDOS.EXE or BSWin.exe and choose the menu item "Bootmanager / Uninstall...".
A "default" bootstrap is written into the master boot record during the uninstall process.
Note for the profi mode:
Of course, the uninstallation is only possible if not more than 4 primary partitions have been set up. The reason is that all partitions have to be entered into the partition table of the master boot record.