@Ralf: We do not recommend installing packages manually with Max2Play. Shairtunes2 works out-of-the-box, now. First try disabling the faulty version and running only the 0.79 (fork). If that does not work, please burn a fresh image and immediately after installing the SBS, head to the settings of it and activate shairtunes2 (fork). We will remove the faulty version of shairtunes2 in our next release.
@Bob: Thanks for the feedback, this will be fixed in the next release of Max2Play and will already be fixed in newly downloaded versions and in the beta in the next days. Regarding your other questions: I am not sure I follow on what information/feedback you require?