Hi Edith,
There's little point in deleting your own posts in this topic as the replies all contain complete quotes of your posts and you won't have rights to delete the posts of other users.
Your posts were made as an unregistered owner, so your email address has not been stored by Nabble.
My understanding is that when a post is made as an unregistered user a cookie is placed on your computer so that you will automatically make further posts with the same id. Of course, after such a period you are likely to have changed computers and not moved that cookie to your new machine. I have no idea whether it is easy to mock up an appropriate cookie and regain control over your posts in that way.
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.