4k stogram completely stopped working

For some time now, 4k stogram had trouble staying logged in to my Instagram account. I would have to re-log in several times a day. And as of last night, it refuses to log in at all. This morning, the application crashed about 10-12 times as I tried to log in, and right now, I can't even open the application AT ALL - I start the app and it immediately crashes. I re-downloaded, re-installed and restarted the computer and all that, but the situation remains the same. URGENT help needed!