I just tried to use hummingbird. All seemed OK (though there was an issue where my revolution slider stopped working due to duplicate jquery - think I can fix that by excluding a file?). Then I tried the check enqueue section and it was checking for about 20 minutes so seemed to be stuck. Tried deactivating the plugin which dodn't work, ended up renaming the folder via FTP then deleting it there. Under WPMUDev plugins it's still listed as being installed.
Please can you check on this for me?
I have granted support access.