I purchased Web Premium CS5 and it came with Flash Builder 4. The Flash Builder 4 plugin for eclipse on the other hand was always available online separately (uses the same serial key though). Now that CS 5.5 is out however I can't find the plugin for eclipse Flash Builder 4 (the only one out there is plugin for eclpse Flash Builder 4.5). Where can I download the plugin for eclipse Flash Builder 4 or is there a way to install it using my install package?
Unfortunately, I think you're out of luck. Adobe no longer supports FB 4 now that 4.5 has been released, and that includes providing the plugin and installer downloads. I ran into a similar issue with the standalone last week. The only real option is to find someone else who has a copy of the plugin and see if they'll send it to you.
I am also having the same problem.. Did you find any alternate way for this ?
No sadly. Any updates on your end?