If you update jAlbum, you will get the current release, 19.3.6. You will have 30 days to use that version. To continue using it, you will need to purchase a current license before the trial period expires.
In this case, I don't think that's going to solve this user's problem. I just did some quick experimenting with Lightflow. It seems to work fine with jAlbum 19.x, but the album is unusable in Firefox. Works OK in Chrome and Edge. Even going back to jAlbum 13.5, I get the same result.
In short, I think the skin itself is the problem. It may be time to move it to the "legacy skins" section, unless kaya wants to wade into it.
And it's probably time for this user to find a new favorite skin.
Somehow my custom header image and some other navigational elements gone missing after I generated the album with 19. So I downgraded back to 13.10 and now everything seems to work fine. Also in Firefox.
Thanks jGromit for the "heads up". LightFlow'a latest version (3.10.0), released in October 2016, is free of charge. This means it does not require any registration or license. It contains all functions that have ever been developed for LightFlow.
I'm sorry if LightFlow is no longer compatible with the latest version of jAlbum or some browsers like Firefox, but unfortunately I don't have the time to deal with it right now to fix it. Thanks for your understanding.