Catalina: New installation of Bridge and LR Classic don't start

[p.schaerer]

I have a brand new MacBook Pro with OS Catalina. Nearly no software installed yet. 

Installed CC, LR, LR Classic, those worked. (always speaking about the latest available version if not stated differently). 

Installed Bridge:  Crashed immediately. 

Tried to deinstall and install earlier version of Bridge. Bridge still crashes. 

Installed LR Classic again: Now this program won't start neither. It shows the splash screen and after that NOTHING happens. 

Tried to deinstall all applications, installed bridge, still crashes on startup. 

Installed LR Classic, still nothing after Splash screen. 

Well can anybody help me? What should I try? I can provide the crash protocol. Bridge currently is most important for me. Photoshop runs. 

[kglad]

reset your bridge preferences, https://helpx.adobe.com/bridge/kb/troubleshoot-errors-freezes-bridge-windows.html

[p.schaerer]

Thank you very much for helping. 

I followed the instructions started bridge with the key combinations, got the dialog to reset which I did. But after this Bridge again crashed from the beginning. Tried it many times. 

All the other instructions of the hepl article apply only after starting bridge, they have to be performed from within Bridge, so I cannot do them . 

Is there anything that I can do from outside Bridge to help it to start again? 

[RuskinF]

Install Adobe cleaner. Remove all the CC apps from there.

Once every app setting and files are removed, install the CC again.

This ought to help you.

Because Adobe cleaner removes all the traces of CC from your device.

And then installing the CC means that you are installing everything afresh.

[p.schaerer]

I did. Unfortunately it didn't help. I have deinstalled everything and installed CC and then Lightroom Classic. Same result. Well at least Bridge didn't run from the beginning (Lightroom Classic did at first). So I have a new machine with a virgine installation of the operating system and install the latest version of CC and the applications that I need most don't work. I just don't know what to do.