whenever i try to open balenaetcher in ubuntu, it comes up with a screen saying “no apps installed that can open balenaetcher-1.13.1-64.AppImage. you can find more applications in Software”, i dont know what to do
Making the file executavle shuld solve your problem or adding some appimage integration to your system.
Many guides are there about appimage on the internet like: How to Use AppImage in Linux [Complete Guide]