Notes about the ANT file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The ANT file type is primarily associated with 'calcAnt' by SFR GmbH. With calcAnt you can do calculations, comment your calculations and save them; open your calculations again afterwards and change some of the numbers.