[eBug]

Hi,
Everytime I click 'Check for Update' in Settings-> About, the app totally freezes. This is 3.5.5 r-ink version on a Onyx Max Lumi

I can confirm the problem.
It doesn't just freezes the app but the whole system!  I had to hard reboot.

Try pressing the Home button: after a few seconds, you'll get a 'MobileSheets isn't responding'. Then 'Close app'.