Use Sentinel to export your HP files into an *.hpe file. The Export is under the drop-down file menu.
Note where this file is being saved. During the export, you can pick the Favorites list you want to add, whether all of them or only some of them.
Once your *.hpe file has been exported, then use the Sentinel version for the 4436/536HP scanners to import the file you just exported. The import is also under the drop-down file menu.
Once you've imported the file, then you can edit it in the x36HP sentinel software. The base file information is the same (System, Departments, Sites, Talkgroups, etc). But for the x36HP scanners, you can also assign quick keys for the list itself as well as Systems/Departments/etc, and add the LED alert light colors, so edit those however you like. Note that you can also export from the x36HP Sentinel version into an *.hpe file, then import that into Sentinel for the HP-1/HP-2. The quick key and alert LED settings (from the x36HP) will be ignored for the HP-1/-2.