Cannot find an instruction upgrading to v2.0.0-rc1.
Assume its this procedure https://help.passbolt.com/hosting/update
Its not working 
Changes seem to be big. What do i miss? Fresh install?
Hi @kingfisher,
There is a link to a draft procedure for this upgrade in the release notes.
Kindly note that this is a release candidate. While it has been audited and tested in depth, there are likely still bugs or glitches. Please wait for the official v2.0.0 release if you prefer a fully stable version.