Hi,
not sure if this query is still relevant a few hours later, I guess maybe not as I think you've been able to edit your post ?. Eitherway, no I don't think your thread is locked, looks like I'm able to post a reply to it. If the thread was locked it would clearly state as much. I see you've been using the site for some years but only occasionally. Just a few months ago the site was updated, just one of the benefits of this is that threads don't get automatically locked as they used to.
Hoping this helps, Jeff.