Ipad 2 - tap OF icon, app appears but then disappears - help!

Hi all,
just wondering if anyone has experienced this:

I have OF running on my iPad, never a problem, I use it to add items throughout the day.

For the last two days I can’t get OF to display. If I switch to OF, or restart it, it displays for a microsecond then disappears. It still appears in my list of running programs when I double click the iPad button.

I’ve restarted my iPad. Still the same.
No other apps running, plenty of memory (128 model).
Any advice?

thanks, K.

It’s fixed!!!

an update just appeared on my iPad - and this had fixed the problem.