Our company has some internal IDEA plugins that we use. We don't want to post these on plugins repository but asking people to find their IDEA config folder, and unzip over it, is much more to ask than the simple button click that is required when using plugin manager.

I suggest any or all of these:
1. Add "Install plugin from hard drive" button (with better wording)
2. Register file type .ideaplugin which specially executes with IDEA to install the plugin (this is common on OSX)
3. Allow multiple plugin repositories - we can host our own plugins list XML

Issue was resolved