Atari-Midi Archives

Hello everyone from a new member. 

My beloved Atari 1040ST died recently, although I still have a box 
of valueable songs on 3.5 floppys. I have managed to convert a lot 
of the files into a format that my PC will read and can still run my 
midi information on my brand new PC. However, naturally the song I 
need the most was written on a program called "Tentrax" which saved 
it's songs as a file format called "SNG". Is there any possible way 
of converting these into a midi file or a cubase format so that I 
will be able to finish my masterpiece??? Any help would be 
greatfully appreciated. Cheers Brad