Save maps after using Create Image Record
I've been making liberal use of the ability to add objects, line of sight, and all sorts of tiles to existing images to create my own maps. The thing is, I'd like to save some of my hard work once in a while. After taking a single 10x10 forest tile from an asset pack and expanding it into a positively massive multi-part map with a hundred different details I lost all my progress when I went and "renamed" the file and its unidentified title as well. Fantasy grounds just reverted that image back to the original 10x10 tile as though nothing had ever happened in the first place.
I can understand quite clearly that my first mistake was attempting to rename the file in-editor, but I'm not sure I know why. Isn't there some way I can save new files made out of assets from the many packs I've purchased? Will I only have one option every time I open (for example) Dark Forest 10x10--to start a new map or build on an existing one? Also, in the event I should lose the data, like I did above, how can I get it back? I have already checked my local folders and there's definitely no new files. Should I be approaching map creation from a different angle?
Any advice would be welcome.