Now in 1.1.2 I can use the claw with 64bit ksp, partly.
When I click the button FREE PIVOT, the button was changed to LOCK PIVOT, but the status is still LOCKED, and nothing really happened. Then I switch to the 32bit version, it does't work as well.
Then I created&launched a totally new vehicle to test it, but still doesn't work.
windows 10 10586, x64&x86, steam