Update from 2.7

[lpcarrol]

I have been using Gas Cubby free version 2.7 for over 10 years to track 9 different vehicles. I have alot of data, that I really do not want to lose! Recently after updating the IOS on my iphone 8 to IOS 11.3 the free 2.7 version stopped working properly. I could start to enter fill up data but then the app would crash back to the main iphone screen. After numerous attempts to enter a fill up and multiple reboots of my phone I gave up on getting 2.7 to work and downloaded and installed the new version 3.3.1 build 1743. Now I am stuck and cannot figure out how to migrate all my data to the new version.

Help!

Thanks - Pat