The program recognises and supports all common subtitle formats: ssa, srt, sub, txt, ass, mkv, mks and mka. That means you can load any subtitle file with no problem and edit it.
AegisSub also includes a translation assistant to transcribe line by line the subtitle in case we have it in a different language.
Of course, it also offers synchronization options to move all the text or only some parts to make it appear in the exact moment.
There are lots of amateur subtitlers out there who will love this attractive application called AegiSub.