Vault 3 has been updated as follows:

• Vault 3 no longer crashes when launching on Mac OSX "Big Sur" (thanks to user Cristiano C. for reporting this issue and verifying the fix)
• Vault 3 can import files having no file type

To see the import change, select File / Import / Import Text Files, Photos, and Videos from Disk Folder... In the list of file types, the first item corresponds to files like "README" that have no file type:

Download the latest version of Vault 3.