When I start r206, it doesn't open the menu bar. 3 weeks ago I run C2 with no problem with Windows 10. But then I could not running any more.
You have posted this in the (retired) Construct Classic section by mistake.
r206 is an ancient version - update to the latest stable and try again.
The latest version - r239 - is available from the following link:
If you have any other issues, please post in the correct section, which is the Construct 2 'How Do I' section.