Right, I have spotted something that might be causing it, so have uploaded a new version now for you to try.
Thank god, whatever that caused it, now I have the themes back. Thank you SO much!
While I'm here, I have some suggestions for Forts.
- size of them (amount of middle blocks there can be)
- changeable gap size in between them
- blank space outside the forts
- force specific pieces
And I found an error in Fort generation, every time the theme is set to -Beach. This may be the same in all of the generators.