4K Stogram problems (paid version)

Several problems with 4K Stogram (paid version) since the last update: 1) My Instagram login data get regularly lost (approx. after each 2nd start of the program). I'm logged out when the program starts and have to login new. This happens even, if I start the program 3 or 4 times within 10 minutes. It's very uncomfortable since the photos from private accounts and stories aren't downloaded without login. 2) Story downloads appear two times in the thumbnails (always double), even I find them only once in the file folder. 3) The update of several people I'm following doesn't end, they are constantly in progress (and aren't updated). This happens especially to the people I'm not following on Instagram, but ONLY by 4K Stogram.