Danger! Updating will blow it up on your iPhone 3G

Paid for this app a while ago and it worked sort of ok on my iPhone 3G, but an update in early 2012 raised the required OS to 4.3 which does not load on a 3G, and without warning, updating it removed it from service. Thanks. Where is my functionality or my money?

om about TouchPad, v4.0.5