Hi, thanks for your reply.
I have actually emailed to the support and got a reply from "the support," it took a week or more though. In the email they think my system is corrupted and I was only suggested full-restore of my iPad and that is not an option for me -- my mothership macbook isn't near and my free iCloud account doesn't have enough space to make a full backup. I don't really think the system is corrupted since I don't have any other problem with iRig or other apps..
So, at the moment I'm living with it...