Thanks for the report, I previously believed that this is a single problem.
To backup data, you can use iCloud. Also you can save the file trend.sqlite to your computer via iTunes, this file contains all the data. When you need to restore data, simply return the old file in place.
Thank you for the reply.
Reinstalled the app. Clean install d/n have a problem w/ rapid templates and works flawlessly. But once I upload the data from iCloud (or trend.sqlite) - then it's back again. Something in the data messes w/ the templates.
To give you some possible hints on where to look for the bug - the bug first appeared when I was trying to create an already existing template (I've previously set up the check/acc-cash transfer template, but did smthg wrong and template had persistently shown "dimmed" icon (as I now understand - because currency wasnt set up). I've tried to create a new template w/ the same name and all other parameters. That is when the app started force-closing. The phone was 100% offline if this matters.