http://www.uploadify.com/download/ is where I got the missing files, though seems tubeace wants the old version of one of the files; jquery.uploadify.v2.1.0.min.js - assuming it specifically needs that, and not 2.1.0 and higher (2.1.4 in this case).
File does not exist: /web/sites/***/domain.com/uploadify/jquery.uploadify.v2.1.0.min.js
whereas I have: /web/sites/***/domain.com/uploadify/jquery.uploadify.v2.1.4.min.js
Pure guesswork now - do I need to source 2.1.0 or is there a way to modify a line in tubeace somewhere to specify 2.1.4?