I discussed your issue.
There is also a chance that something might have gone corrupted in your configuration file.
Perhaps this plug-in can help with removing corrupted files.
Or... If you don't mind starting over you can perform the clean install steps here:
Welcome to the Ultimaker Community 🎉
That's odd, I've never heard of that before. 🤔
Could there be something wrong with your configuration folder, that's the place where Cura remembers your printers.
You can find it by :
I'll bring it up to the team to see what they can do to help. Fingers crossed 🤞
In the meantime, have you considered using a back-up?
You can find it under Extensions | Cura Backups | Manage Back-ups.
That restores your configuration folder so both your printers and your profiles.
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