.srt filter has disappeared from my subtitle options?

[AnCi]

Hello,

I'm using Avidemux (GTK+) 2.5.4 with linux mint. I wanted to hardcode subtitles into a clip (avi) i was making and i only saw three options when i opened the subtitle folder: VobSub, ASS, and DVB sub (also, fyi, whenever i click 'DVB sub' avidemux crashes). I only have an .srt file and it hasn't worked with any of these. Is there a way I can get that filter in there?

[Jan Gruuthuse]

You need to build avidemux 2.5.6 yourself. Following instructions for ubuntu should work for mint.
Get source and follow ubuntu manual installation following this wiki.
2.6.8 only uses ssa subtitles.