Fedor,
While we could replicate this issue at our end, we do not believe it is specific to the pre-release. The systems we were able to replicate this on were all Windows 10 systems, which had the recently released Creator’s Update applied; we could not replicate on Windows 7, for instance. On these systems, we can also replicate the problem with the production releases of Webclipse.
Can you share your system configuration? Is it Windows 10 with the Creator’s update? Or, have you recently installed any custom shells onto your box (GitBash or other)?
Thank you for reporting the problem – we’re working on getting a fix into the CI 6 release.