I've got a bunch of old .tc3 files (and really old ClarisCad files, for that matter) that I need to revisit, but I don't have TCad v6 available any more - that old computer is long gone. Other forum posts had links to download v6, but these now return the dreaded "404 - page not found" error; I'm waiting to hear back from IMSI tech support to see if they can still make this available (their original response was "try v11 build 1441"), but I'm not overly hopeful.
Is anyone out there who still has v6 available (if there is anyone) willing to run some file conversions for me? I can put the files up in Dropbox for you (nothing proprietary in any of them). Or has anyone reverse-engineered the .tc3 file format so I can blow the dust off my programming hat and try to write a dedicated TC3-to-DXF or TC3-to-SAT converter?