That font has never been included with any Adobe product, so you probably downloaded it from a free font site. The font designer, however, says the free version is for personal use only and you should contact them for a commercial license: BYTHEBUTTERFLY@GMAIL.COM
To use any font you need to install it.
What type was the font?
T1? If that is the case, it is not supported on modern OS anymore. You can use it, if you copy T1 fonts into the folder aside the Adobe programs. Only in those programs it will work.
I don't know what font Peter found. But the Simplicity Extra Bold I know of was sold by SWFTE International which back in the day was sued unsuccessfully (I believe) by among the complainants, Adobe. If it is the same "hand-writing" font I am thinking of, it cannot be sold/licensed by the named person. And SWFTE no longer exists. Because of its age, it would be a font of limited usefulness.
I just googled Font Simplicity...