Hi @CascadeHush and welcome to the community 
Thanks for the detailed instructions, those will be helpful for some of Bitwarden’s users. I was wondering though what might have changed within the mSecure format as Bitwarden has a dedicated mSecure importer.
Would you be able to provide an example file? New headers and some example entries?
If the current importer isn’t working or only supports an older format, then a bug report should be opened on Github (Web or CLI).
Kind regards,
Daniel