As a windows user I'm very dissappointed in the fact that the Backup Client is not supported anymore in Bitbucket version 5+. It's the most straightforward and simplest tool there has been. It's already really frustrating that I have to go through all kinds of trickery and workarounds every time creating complex environment setups for all the different Atlassian products that all have their own methods of setup, upgrade and backups, and this even varies depending on system. As a commecial product I would expect more focus on usability, business value and focus on the customer TCO. Dont make a Windows version if you can't properly support all aspects of it.