Something similar is happening to me. Get no sound (nor bluetooth switched on) when launching the app (which, BTW, looks to be in a misplaced window).

When launched via the command-line I get the following:

/opt/fmradio # run-standalone.sh ./FMRadio.py
cat: can't open '/etc/osso_software_version': No such file or directory
/opt/fmradio/components
0 57 800 367
Please insert a headphones cable for a FM antenna.
0 57 800 367

And believe me, the headphones are correctly attached...

Any ideas?

Thanks in advance