Many of us think that the only way to get the free version of AegiSub is to register and download it. Well, that's true. After you register, you have to download the "Free Trial" software for a month to have a chance to try it out first hand. After this trial period, you can buy it or you can register again and continue downloading the program.
Of course, some applications come with a limited number of licenses. This means that there is only a limited amount of downloads that you can get from the website. So if you are only interested in one, you might want to register as many licenses as you can. You will get the software if you are allowed to download it. It might also be possible that it will not be able to be downloaded if you do not have any licenses.
In case you are going to register an online application, you can actually download it and use it without any problems. However, if you are registering for a Windows license and the program is not available for your operating system, you won't be able to download it. I also suggest that you check whether the application has the same interface on your computer as it does on the website. Some applications are available only on the website and the ones that are available on your computer don't have the same interface. So make sure that you get the one that suits your computer system.