If you choose to edit files yourself you could have problems... like you described in another post
If I make a change in Options/Flightdeck Calls/VCP-X section, I must then click on 'Save & Exit' of course to keep any changes. But then back in the Flightdeck calls window, I assume I need to click on 'Save Changes' too, second from the right. But must I then also click on 'Save Profile', the first box on the left, to save these to the profiles that I will later load - or are the changes somehow applied globally without doing this? If I don't click 'Save Profile', I am not sure things get saved properly - as with the no flap call problem in another thread here.
No, you don't have to use profiles but they are intended to make things easier for you
However, if you use the same aircraft all the time you wouldn't need them, but if you find yourself having to tweak various settings depending on which aircraft you are using then yes, use them. All you need to do then when you change your aircraft is simply reload the relevant profile
However, if I do choose 'Save Profile', once I have entered the title in the box that appears, I immediately get a different ..._FDC_Controller.dat file - a new one for every profile I change. In addition, the profile (.pro) file as saved, instead of being 4- 5kbs in size, is now hundreds of kilobytes in size and takes ages to load, if it loads at all. The extra space is due to a new section at the end called [Parameters], which takes up about ten thousands lines of text, 99% of the .pro file. It's basically what is in the FDC.ini file. Is that supposed to happen?? Surely all my profiles aere supposed to be small files, not these monsters that are created when I press 'Save Profile' in the Flightdeck Calls window (given they don't load properly when you select them)?
Well hundreds of kilobytes should take 'ages' to load. Perhaps you could let me take a look at one in case there is a problem somewhere as I'm rather concerned with you 'ten thousand lines of text' which is certainly not correct. I now it's been about 16 years since I wrote FDC but I don't remember saving a copy of war and peace with each profile!
And yes you will get a new controller file for each profile as that information is also saved per profile