Forget it. The support function is essentially no longer existent, because Shinji has gone on to the corporate world and no longer has the time.
If you want to see if your account was wiped out in the crash of the site several years ago, try using the Google advanced search to search out posts with your name on them. If it was wiped out, the posts will not come up in the search, as they are now attributed to “[former member].” If not, then you can still search the posts with Google advanced search using words from a post.
If you can’t remember the login info for the old account, then forget it, and use a new one (as apparently you are doing here).