I have found a small regression when upgrading from jAlbum v23 to v24 : if one of your album folder has a name which includes the "apostrophe" character ('), it won't be possible to launch, i.e. a press on the "start" button does not do anything.
This occurs both when testing your album locally and on the remote downloaded album.
The apostrophe character is used quite often in French and it seems repeatable.
I am using the "Projector" screen and running jAlbum on Windows 7.