When I try to open it, this shows up

An error has ocurred during startup:
java.lang.ClassNotFoundException: org.jdownloader.update.launcher.JDLauncher
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
at com.exe4j.runtime.WinLauncher.main(Unknown Source)
at com.install4j.runtime.launcher.WinLauncher.main(Unknown Source)


I tried to update it with the JDownloader2Update but the same thing shows up, I also tried to uninstall it but another error shows up and it create a .txt file, it´s pretty big to copy-paste it here and for some reason I can´t attach it

I already made a backup of the cfg folder, just in case