All the posts I saved to help me figure things out about the Modx are gone??? I guess Yamaha changed there system and decided not to keep the old post.
Only Yamaha can help you with that. Use the 'Contact Us' link at the bottom right of the page. Your account only shows 6 posts.
I know you shouldn't need to do it but I suggest that you may want to start to periodically save any threads of interest to ensure you will have them later.
I don't know what you're looking for exactly, but I looked at the oldest post you were involved with (3 years ago). And there a user left a link to another message in this forum. That link now fixed is:
https://www.yamahasynth.com/forum/a-d-volume-changing-when-switching-sounds
From time-to-time Yamaha decides to update their file structure for the forum. In the above the "/forum/" directory was once "/ask-a-question/". When they make changes like this, all of the previous links break. All of your bookmarks will break. And so on.
If at the end of your link is a thread title (like "a-d-volume-changing-when-switching-sounds" in the above link) then just make sure the rest of the link conforms with whatever is the latest standard for the message path. As of today is:
https://www.yamahasynth.com/forum/
Then tag the message title (with dashes for spaces and other non-friendly characters) at the end.
Current Yamaha Synthesizers: Montage Classic 7, Motif XF6, S90XS, MO6, EX5R