I think it has always behaved that way and is meant to. Left or right-click bring up the menu. Double-click does whatever Preferences / Launching Opus / From the Taskbar icon is set to do.
[quote][ul][li]Bulk renames only work on the first file selected rather than all files selected — sometimes. I wish I could say there was a repeatable pattern to the failure, but it's happened a few times today and not happened a few times. 
[/li][/ul][/quote]
Difficult to answer without an actual example, but I suspect the rename pattern you are using only matches the first file.
Unless they're related, it's better to use separate threads for each issue. Otherwise, everything gets jumbled up and is difficult to follow and harder for people with the same questions to find when searching.