Have you checked/enforced which JDK is used by Eclipse with the -vm argument as suggested in SSLHandshakeException from Eclipse (MARS) to hanatrial.ondemand.com (where I see you've posted a comment as well)?
As for the missing runtime - I have no clue what might have happened, however you can easily create a new runtime in Eclipse Preferences > Server > Runtime Environments. Then you can also assign the runtime to your existing servers by double-clicking on the respective server in the Servers view and opening the server editor.
I'd also like to remind you to follow The SCN Rules of Engagement and follow up on your old threads - e.g. Proxy Problem. See How to close a discussion and why.
Cheers,
--Vlado