Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
See the first item in that list - Enable Data File Debugging - turn it on - then the rest of that list of options becomes available.
As a note on the purchasing, I'm pretty sure you should be able to try out the authoring kit, and create a new game system while that's still in demo mode, but for actually developing a system, I know I'd find it pretty impractical to be in demo mode because you can't save characters - there are a lot of times when I'm debugging an issue where I will create a character that shows the bug, save the character, make my change, and then reload the data to see if that fixed it (reloading auto-loads any character who was already up). Having to add 3 or 4 things (or more) to the character before I can get back to seeing the bug would be a hassle, especially if the first attempt doesn't end up working and I kept having to try new things.