My subsonic.sh is located at /share/MD0_DATA/.qpkg/Subsonic. This is the same location for the .war file. It is installed from the 'official' Qnap package on a 419p+ with RAID1 for what it's worth.
I do not have a Subsonic dir there. I have one under /share/MD0_DATA/.qpkg/Tomcat/tomcat/webapps and because running on a QNAP I changed the location of the Subsonic db and settings away from the var dir, as this dir is located in the volatile area (which gets erased on each reboot of the QNAP). That dir is: /share/MD0_DATA/Subsonic - and no .sh file there either.