in this cases my first guess is always renoise.
it's cheap, you can install as many instances as you like, on basically each relevant operating system. your license is not coupled to a computer or dongle.
it's a tracker, you may like it or not, BUT even if you don't like trackers it may be usefull:
it has a neat little sampler and wave editor for samples built in, and it can host vst plugins and instruments (which you can sample then). and you can play it with your qwertzy keyboard (sounds pretty useless, but in fact it's a feature one will really value high when no midi keyboard is available).
make some sounds, edit some loops, whatever, play around and then export as wave file for later fun at home.
