Sorry for being so quiet in the last few months.
Due to personal lives development has stalled, but we are still spending a reasonable amount of time on hunting the memory crash bug introduced in the latest releases.
Sorry for your inconvenience and hope you enjoy the sunny summer.
Hope to release a fixed version in the near future.
UltraDefrag - Maintainer
Any news regarding UltraDefrag v7?
We are currently busy with our private lives, so not much progress on the bug hunting border :-(
Thanks for your patience.