Help me !How to restore the old version of the wallet?

I accidentally uninstalled and reinstalled the wallet to 9 7.1_0. The previous 9 7.0_0 file is still on the computer, but I forgot to back up the private key. Can I restore the previous version and log in?

Sorry to hear about your troubles. Always back up your secret recovery phrase. This article may be able to guide you through recovering the secret recovery phrase to regain access to your wallet. https://metamask.zendesk.com/hc/en-us/articles/360018766351-How-to-use-the-Vault-Decryptor-with-the-MetaMask-Vault-Data

Thank you, I have solved it. I didn’t know that MetaMask is a multi-layer confirmation wallet until yesterday. You only need a mnemonic phrase to find other wallets created.