This thread made me finally get around to making a builder-to-builder copy of my module. (That's all I need, right?)
Well, it's been so long, I've forgotten what folders are associated with my module. Does the backup or B2B include files like the custom tree textures I added to my module?
Whether you created a database backup or a B2B file it would only contain your module's design resources. Design resources are the ones displayed in the toolset's resource palette (along with sounds files and models which are something else). In other words areas, area lists, characters, conversations, creatures, etc. It also includes the strings that may have been created for these resources.
WARNING: It is important that you CHECK IN all your resources before making the B2B or backup in case you end up trying to recreate your mod on a different computer or as different user.
(It appears I'm becoming predictable in my old age or Luna knows me too well! Probably both!)
However neither includes any art resources you might have created. Art resources the rest of the things you can create in the toolset. In other words levels, morphs, materials, visual effects, etc. These are file based so you should have an editable source file (that can be loaded into and saved from the toolset) and a compiled version (that the toolset and the game use). The source file will be wherever you saved it (I typically save mine in my mod's assets\art folder), while the compiled version should be in your mod's core\override folder.
External files, such as the XLS spreadsheets used to create 2DA files or the WAV files used to create voice overs, are very similar to art resources in that there is an editable source file (albeit you must use a third party program rather than the toolset) and a compiled version (that the toolset and the game use). Again the source file will be wherever you saved it and the compiled version should be in your mod's core\override folder.
However I suspect your tree textures are slightly different again insofar as (I'm guessing) they are DDS files used to override one of the existing tree textures. If this is the case I would expect them to be in either your mod's core\override folder folder or the [My Documents]\BioWare\Dragon Age\Packages\core\ folder (if you wanted to override them in all modules).
Therefore if you backup the database or make a B2B and backup your mod's sub-folder in the [My Documents]\BioWare\Dragon Age\AddIns\ folder you should be able to rebuild and extend your mod albeit if that didn't include the source files you wouldn't be able to modify the art resources or external files.
As it may be relevant to people trying to restore old projects on new computers I made a couple of posts in this thread regarding backing/restoring and some solutions to problems I encountered. And I made a post in this thread that mentions (unfortunately no more than that) some ways to resolve the "red dot" issue (resources checked out to another account).