decryption password is not correct I agree with you that Explorer should copy the files as is - or at least have an option to ignore that they were backed up with encryption using one of our other products. However, as it stands today, Explorer recognizes the backup files, and tries to restore them using the encryption password you can set up in Options - Compression & Encryption. But if you do that, the files are decrypted during the copy operation and they will no longer be backup files. I'm still checking at my end to see if there is a work-around for this other than what I'm going to suggest.
You can use Explorer to copy the files in Freeware Mode. Freeware has no encryption support, so it will simply copy the files. To do this, you need to release your license from the Help menu. And when you restart, select Freeware mode. You will lose parallel uploads and that may slow down the process. It's not a great solution, but it will get the job done.The alternatives are to use a different product for this one-off copy or to simply start a new backup plan to Wasabi.
I'm going to speak with the team next week to get some additional background on this feature. I'll report back if I find anything useful.