Hi,
Sorry for the issues here. There was an issue with the packager of the premium plugins causing the folder names to change to those crazy long names. It has sense been fixed and will not be an issue in future releases.
You can either manually change the names back to events-calendar-pro and event-tickets-plus through ftp (and then reactive the plugins after the change)
Or you can get the latest version from our site here and follow these steps to manually update.
Manual Updates
Both processes do not delete or change settings or events, but it is a good idea to backup before.
Cheers