Change Timestamp is a portable app that allows you to manipulate the timestamp of any file quickly.
Since there is no installation required, to begin, just unpack the archive, run ctime.exe and select the parameters you wish to change (creation/last access date and time), then drag n' drop the target file, and you are done. Where most apps include drag n' drop, this one is drag n' drop only. There is the ability to batch process multiple files but no option for filtering by type - maybe in future versions, this will be added.
Change Timestamp is a no-nonsense tool that makes the manipulation of file details a simple process that can be performed swiftly.