I stumbled across an old visual studio database at work that was inaccessible.
After finding a couple of Visual Sourcesafe crack applications, i settled on doing it manually with a hex editor (HxD Hex Editor).
Find the sourcesafe database in windows explorer, open the data directory and open um.dat.
Changing to the values highlighted in red reset the Admin password to an empty string.
Cloud Solution Architect at Microsoft in the UK.