There are some plugins for X32 but not for X64.
But above all they are obsolete !
I'm searching for a viewer than can view the following formats inside TC
STEP,STL,3Dpdf, parasolid
And maybe for the future the ability for viewing native formats of Solid Edge, Inventor, Solidworks, NX, IronCAD... sorry if I missed a few
I'm certain that this would be a huge plus if it would be possible.
And I'm also certain that many others CAD users would pay for it if it where available in TC.
I hate windows explorer ! and I'm using Total commander since the invention of norton commander and believe it or not I still love it. It's like my swissknife (another invention of...
)