The main issues with getting a good release of community-ruby in the catalog for NB 7.1 are:
- https://netbeans.org/bugzilla/show_bug.cgi?id=207075 -- Some infrastructure broke which makes it impossible to release at the moment. This may seem like the big problem but in fact….
- Netbeans 7.1 updated some components (as software is known to do). One of those components was html.editor.lib. Ruby support was dependent on version 1, but NetBeans 7.1 only ships version 2 now. This is the main reason why the Ruby support from 7.0 is un-installable on 7.1.
- Select Tools->Plugins from menu
- Select Downloaded tab
- Press Add Plugins...
- Navigate to where you unzipped the nbms files
- Select all files which end in .nbms (you can do this all in one selection but if you include any non-nbms file it greys out the open button)
- Accept and install…