You asked for it. You got it. I seem to be saying that a lot lately. Autodesk Labs is happy to announce the availability of an update for the 2D to 3D Tool for Inventor:
This update adds support for 64-bit. The installer has been updated to MSI installers for 32-bit and 64-bit applications. You select the one compatible for your application, unzip it from the ZIP file, and double-click it to run the install.
Expanding a technology preview to accommodate larger data sets is alive in the lab.