It stopped opening sometime yesterday, I think. I tried a lot of the ideas in the thread "RH7 Eats Snippets", but it still did not work.
Then finally I tried just opening a different project, and found that the Snippet pod does not work whichever project I open. Then I tried closing all projects and then opening the (empty) Snippet. That worked. I got an empty Snippet pod. So then I re-opened my project. The Snippet pod then immediately disappeared again.
Note that the snippets still work. In my topics I still get the snippets as before, and I can create new snippets and insert them
You're right ... it had collapsed sideways somewhere ... <blush>