Can i rescue a single encrypted file, easily?

[ccchan]

looks like NOT, no way.

Sanitizer's decryptFile must work with a whole vault? can it work with file only?

I just rescued a single encrypted file say T^YUH(^O&UIY()&YOHUIHO&(&HJ from my google drive. sanitier 's decryptFILE ask for a vault location, ask for the password, ask for the path. is it I cant get back the plain text of this rescued encrypted file then ? if I can, how? thanks