Apparently, it no longer contains the "diskfresh" utility, however I found this utility separately on the net without all the other rubbish. It doesn't mention win 10, only earlier systems, so it must be pretty old. Haven't tried to use it yet, nor how I would know if it's working, unless it makes an obvious program failure. Found this:
DiskFresh is compatible with Windows XP/2003/Vista/2008/7/8/2012 including 64 bit versions. It provides native support for 64 bit versions.
For such a basic simple thing, this is like pulling teeth.