Hello, i have new description of problem. If I open some .dft files "using Solid program" (in program click on OPEN .... ) then function - switch window is available. But if i open some .dtf files from windows explorer, then this function is not active.
Hello, on my PC there is no other key than "OpenWithList" and "OpenWithProgids". So nothing to delete..
Problem still persist.
Any other idea?
That is always possible, and is an acceptable method to resolve various issues, not just Solid Edge related, but also many WIndows related issues -- you are just making a conscious decision to not do this. A user profile reset can be accomplished in five minutes and can resolve the issue. Instead you are choosing to spend many hours trying to find a different solution. IMHO, it is much better to have the issue resolved and the user back up and running than to spend energy pursuing other workarounds that otherwise can be easily resolved.
If you create a new Windows user profile, but not actually delete the existing user's profile, does this issue go away with a new profile or not? If the issue goes away under a new profile, then reset the existing user's profile and move on. If the issue remains under a new Windows profile, then rebuild the workstation and move on. This is not a common issue that is being reported by other customers and appears to be unique to your one user/machine.