I’ve tried to update my old posts from the AJ Community Guide like this:
But I can’t. All edits button disappeared and delete button is inactive. I suppose it happens with all old posts. I have to regularly update such crucial information for the community. Can anybody help me with this? Moderators?
Strange. We have it set in Discourse that there’s no time limit for editing your posts. I can certainly edit it if you like, but I’d like to find out why you can’t 
I may have figured it out. Because the post wasn’t the main post there was a time limit on editing it. I’ve just changed that so you should be able to edit it now.
@KingDog thanks for the superfast help! Yep, works fine now!