The new beta v771 has a new feature to import a GDTF files, which is a common file format to define fixture templates.
Go in the template editor (view/Fixture template menu) and click on the 'Load GDTF" button. This import all modes from the file along with presets for channels like gobo, color wheel, etc. Then you can review and finish editing the template. Click save to create the Lightjams template file.
For those new to GDTF, from the website: "The General Device Type Format (GDTF) is an open, standardized file format for describing devices in the entertainment industry, enabling consistent data exchange for intelligent lighting and other equipment."