I see it's a Windows executable. I'm nearly always on Linux.
Anyway, I'd suggest you consider the command line programs:abcm2ps
to produce a postscript file for viewing/printing.
abc2midi and possibly abc2abc from the abcMIDI
package to produce a midi and for transposing. There is a postscript converter in this package but abcm2ps is very much the standard.
If you wanted to go further and produce a pdf file from the postscript, you could use ghostscript but whereas the other programs all compile to small files (on my PC, abcm2ps:700K, abc2midi: 260K, abc2abc:126K), the ghostcript executable alone is 19.1Mb and I think other support files are needed. Also, it may need its own install (I've only ever built from source - currently about 30Mb download or used packages in with Linux distributions). It might be a bit much if you are distributing your software although you could always allow it to be used if present on a system.