How to locate the data folder
Either download and launch this Application or look for it manually as described below.
|GrandTotal 3 & 4||~/Library/Application Support/com.mediaatelier.GrandTotal3|
|GrandTotal 1 & 2||~/Library/Application Support/GrandTotal|
On OS X your users Library can be shown by using the Go menu of the finder while holding the shift or the alt-Key