I just downloaded Fitday PC a few weeks ago, after trying Dietpower (which is also a good product but takes up more space on my computer and is too complex for my needs). Actually I have no trouble doin' the calorie, carb, protein, etc., etc., just in my head, but the software makes it so fun and easy to create and store recipes and custom foods and figure out all the macro and micronutrients AND show you graphs, etc. ... logging daily nutrients gets easier and easier the more you use it.
Re your comment on a website calculator telling you you can have 2400 cals a day, maybe it means that is what by the data you entered, the calculator estimates you are currently using per day to maintain your weight ... if that were true, you'd have to cut 500 cals per day off of that (theoretically) to lose a pound a week (500 x 7=3500, theortically a pound) and 1000 off to lose two pounds. Dunno, I could be wrong, but maybe that's what it means ... that sounds about right to me.