Well, I admit I have never been a real UB user. But as UB16 initally was fabric installed on my Dell XPS 13-9370 (KBL), I have kept and upgraded UB as part of multiboot with openSUSE Leap and Slowroll on this machine. So I upgraded to the available UB 24.04.1LTS to prepare a new Cingg test on it.

Actually my old installed Cinelerra Infinity - built: Jun 30 2020 09:37:43 still startup on UB24.04.

1)
I tried first to install the latest cin_5.1.20241009.ubuntu2204_amd64.deb package without success.

sudo apt install <package url> didn't work (like corresponding "zypper in" on Leap does)
So I downloaded the package and tried

sudo apt install cin_5.1.20241009.ubuntu2204_amd64.deb

Reading package lists ... Finished
Create overview over dependices --- Finished
Reading state information ... Finished
E: Cannot find the package cin_5.1.20241009.ubuntu2204_amd64.deb

What is the issue, when the deb package is in the local directory?

2)
So I tried the AppImage

./CinGG-20241120-x86_64-IntelHW.AppImage
dlopen(): error loading libfuse.so.2

AppImages require FUSE to run.
You might still be able to extract the contents of this AppImage
if you run it with the --appimage-extract option.
See https://github.com/AppImage/AppImageKit/wiki/FUSE
for more information

Before this I had installed FUSE according to the wiki

sudo add-apt-repository universe
sudo apt install libfuse2t64

I had a look back into the AppImage (Fuse) mail thread, and ask here if a Fix was found that can be used here?

Terje