Bitmask client bundle asks to install "Missing helper files" everytime it starts

How to reproduce:

• Download https://downloads.leap.se/client/linux/release-candidate/Bitmask-linux64-0.7.0rc5.tar.bz2
• Unzip it somewhere.
• Start with @./bitmask -d -l /tmp/bitmask.log@
• Click "Yes" when asked if you want to install helper files.
• Wait for installation.
• Close the bitmask client.
• Start it again.

Expected behaviour: Should not ask to install missing helper files again. Observed behaviour: It asks to install helper files all the time.

(from redmine: created on 2014-11-24, closed on 2014-12-05)