Getting Avaliable Backup Dates from iCloud
I have an app that was updated. Unfortunately it was not tested very well and the latest version does not work (iPhone 5 IOS 10). The provider "claims" they do not have an archive of older versions so they told me to jump in a lake. Anyway, I may have the older version of the app on an iCloud backup. It seems like I have to reset my iPhone just to find out what backups are available and if the date I want is not there I will have done it for nothing. How can I find what backup dates are available? TIA.
iPhone 5, iOS 10