Open How do i clear push and why cant i open files via chrome from push history phone ?

Hi

very happy with Join, but have 3 questions:

1. i have now quite a lot of entrances in push history, how do i clear these, from chrome, android and windows 10 app ?

If i press clear on my phone they are still there on chrome extension.

2. why cant i open pushed files via chrome, from phone push history ? I get an error saying file cant be found, why is that and can that be solved or is that expected ?

3. And when i from my phone go into push history and try to open a file pushed to pc Chrome, via the pc push history, i get error cannot show image. Why is that and can that be solved or is that expected ?

thanks

Jorn