Where is the function

I have installed Devonthink on a new computer. Previously I had a function where Devonthink was listed in the top right corner of the screen and I could drag and drop documents there.
I can no longer find the settings for this.
Also missing is a link to extensions or rule templates, which I could previously access via a link in the Devonthink menu

Thank you very much for your support

Best Regards Gerd

I imagine you’re referring to the Sorter frm DEVONthink 2.x.
You can still display the Sorter in a tab docked on the side of your screen, but (1) the Sorter appears differently and has more functions, and (2) it requires DEVONthink to be running in order to access it.

Also missing is a link to extensions or rule templates, which I could previously access via a link in the Devonthink menu

I am not sure what you’re referring to here, but there is DEVONthink > Install Add-Ons as well as the Scripts menu > More Scripts. Is that what you’re asking about?