The JustJ JDK that we usually ship pre-installed into the Eclipse based distribution is not there anymore. It is also missing from the snapshot builds (so probably nothing specific to the release build).

This causes the launcher to pick up a (more or less) random JDK or does nothing if it can't find a pre-installed JDK (like in a new machine). In my case, I have a few JDKs installed via sdkman, but that only works if I launch STS from the command line. Double clicking the app icon doesn't work anymore.