I just signed up as a paying customer, only to find that Claude is totally unusable for my purposes at the moment. There's also no support (shocker), despite their claims that you'll be E-mailed by the support team if you file a report.
What symptoms do you see? There are some command line parameters for reinstall / update that might be worth trying.
And if you try to use the "regular" VS Code plug-in mode, it fails with error 3221225477. A search will turn up reports on that too.
If you query Claude itself on this, it will acknowledge that both of these are known problems: "Oh, you've hit this known issue." But no support for paying customers, who are promised a follow-up E-mail after reporting a problem. BULLSHIT. A week later, I haven't heard a peep, and what I paid for is thus far useless.