Related: #283
Removing the JPG plugin in favor of GBM would work around this issue for JPG files, but the underlying issue in the core remains that we have no way to specify a preferred plugin for a particular type of document when two or more plugins are loaded which can render the content, nor can we force a particular plugin for a particular file.
I would go one step further and say that if we provide a mechanism to record the plugin preference, we should store that data in Lucide's program directory somewhere or in a user profile directory (as multiple users on the same system may have different preferences - and that's yet another RFE).