Hi. I just startet using Kdenlive on Ubuntu 18.10 but I cannot save my projects, the program freezes and I have to kill it everytime. I tried saving just at the beginning but it's the same. I thought there would be more problems on Windows 10, but there it works fine (on the same computer).

If not already done try with the AppImage 18.12.b
Run the Appimage from the terminal (press CTRL + ALT + T). Move to the AppImage folder and run the .AppImage: ./Kdenlive*.AppImage