I haven’t ever had a script recovery window show up, but I’ve seen other ones like it. Sometimes if there’s an error when saving Roblox will notify you, but you have to choose to load the place (or script probably) from the recovery file, or ignore it. If you don’t do one or the other the message may pop up every time until you do something about it.
You say it happens every time you open Studio, but are there any other error messages while building, testing, or when you Save to File or Publish to Roblox?
Is this a Team Create place where you can build in Studio with other people, or are you the only one with access?
Have you tried uninstalling and installing Roblox Studio in case yours somehow got glitched?
Have you installed any new plugins recently, or put any free models from the toolbox in your game? If they have been compromised and are inserting harmful scripts into your game that may be causing the issue.