Unfortunately, there is no information regarding this process. I recommend you try to open the items from the HGTV Home Design library using File > Open option. You should find the files in the installation folder of HGTV Home Design. There doesn't seem to be a way to connect HGTV Instant Makeover directly to HGTV Home Design. If you have problems, try contacting the developers. You can get in touch with them using the information from the official web page.