It's great to see a new version! Sorry to say that, but the old problem with crashing in Ubuntu when one opens the Preferences or runs Create Photo is back. Version 5.0 works well.
Note I have java version "1.7.0_95", OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-0ubuntu0.14.04.1), OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode).