1. But now i want to edit my creation.
Problemm is that i can't find where this User arpaggio can be found to be edited.
How can i retrieve this userbank with selfmade arpeggios.

In order to edit (as in change the notes played) of an ARP phrase, you need to recall the original sequencer data that you converted to the User Arp to the sequencer.

Once the original data is converted to an ARP, you cannot edit the individual events within the Arp.
An ARP can be applied to any Part. It is not married to the Part or instrument or Performance you used to create it. It is available to any Part of any Performance.

You don’t mention what about it you wish to edit - let us know.

2. If i open an existing performance, edit a part, go to the arpeggio page and than to Individual you see the 8 slots where arpeggios can be sellected.
How can i empty such a slot so it has no assignment anymore?

There are actually 10,239 Preset Arp Phrases and as many as 256 User Arp Phrases per User Bank. That’s (10,495) total maximum.

To set the Arp slot to Off you simply need to enter Off
Tap the first Arp slot… a pop-in menu appears on the left side of the screen
Tap “Number”
Enter the number 0
Tap “Done”
0 = Off

Alternate method would be to spin the Data Dial counterclockwise (but it’s a long list)… I recommend the Number method! 🙂