I was going through my C:\Windows folder while trying to repair a broken recovery file path and found a ReShade folder from November 7th, 2015 at C:\Windows\SysWOW64\ReShade\. The folder contained a subfolder titled PersonalFiles which had two of its own subfolders: Presets and Profiles. They were both empty. Maybe they were always empty.

Yeah, the old "ReShade Assistant" did some weird stuff sometimes before it was replaced in 3.0 =P.