After downloading the currently built ones, I get this error on launch: Also I noticed that you changed the logging folder location   crashlog.txt interestinglog.html mainlog.html

IMHO the ability to board is too generic to be accessible to one civ only, i would rather have it available for all civs with Romans having a bonus that enhances it.

If the maps have just more treasure added, you can always take the maps from the latest version and add more treasure to them. May be easier than figuring out how to install a23 or figuring out how to migrate them.

For the German speakers:

No as the reference is to the Corvus that Rome utilised against the Carthaginians, most boarding would just be people jumping onto the other ship, The Romans decided to drop a whole bridge on them and board that way instead. But the corvus did pose a risk to the ships safety due to it unbalancing the vessel, so I would expect the boarding ship to be more fragile in some capacity. I quite like this as Civ bonus, it is very distinctly Roman, and as far as possible I would like to see this for all civs, things that are distinct and defining for that civilization.