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
Timings~/Library/Application Support/Timings
Discontinued Versions
GrandTotal 1 & 2~/Library/Application Support/GrandTotal
TimeLog~/Library/Application Support/TimeLog
Alarms~/Library/Application Support/Alarms
~ stands for your user folder

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