Thanks Akash, but:
~/Downloads/bin $ ./runenpass.sh
/home/xxx/Downloads/bin/EnpassPortable: error while loading shared libraries: libpulse.so.0: cannot open shared object file: No such file or directory
The question is not how to help enpass find libpulse library but how to disable pulseaudio so that the library would not be needed. (maybe a command line flag?)