I have been enjoying DAVID 3.9 version under 32-bit and 64-bit Windows7.
This evening, I downloaded the DAVID version 126.96.36.19957(2014-07-28) from the DAVID download site, and intalled on my original USB from DAVID.
The 32bit version works fine as expected. The 64bit version, however, does not work as 32bit.
It issues some error message saying that I don't have the License key with it. I doublechecked my USB, and I found the *.lic file in it.
The other problem I found was that the 64bit version was not updated to the version 3.10.4. Instead there is 3.9 version I installed last year.
The current 32bit and old 64bit version reside side by side in the same DAVID 3 folder together with the license file.
Any suggestions are welcome.