We have just released version 1.3.3 of Project Configurator. This new version is functionally equivalent to version 1.3.2 and is also compatible with versions 6.3 and 6.3.1 of JIRA.
Our next goal is to complete tests and required changes, if any, to ensure that it works in a JIRA Data Center (i.e. clustered) environment. We expect this to be ready in a few days.
So, stay tuned for more news!