Hello Sunset Killer,
This seems to be related to the following entry from the 4.14 release notes:
“The GUBP build tools have been removed. Scripts to create binary UE4 distributions are now implemented in Build Graph.”
It also seems that from the name of the source files listed that this is based off the KiteDemo. I would suggest downloading the updated version for 4.14 rather than converting, as there may of been multiple changes made to the structure to make it compatible with 4.14.