bugfix: add "rb" and "encoding" to several with open clause

[randomseed42]

• add "rb" and encoding="utf-8" to several with open() clauses, to avoid encoding errors on specific user environment.
• use df[“Version"] rather than df.Version to avoid mypy type check error

[bryevdv]

Sorry for the delay @randomseed42 this repo does not require much attention and I didn't have notifs turned on for it.