2
You can update the GUI and continue to use the blockchain already downloaded.
2
Open the basic wallet and let it synchronize
Click on the "exit" button at the top left of the window (the symbol is like a door with an arrow)
There you should see a "Change wallet mode" button
1
Your wallet restore height (2271489) is above the height of your transaction (2270830). You therefore need to change the restore height to force a rescan from before the height the transaction occurred. See this answer.
1
You will need your mnemonic seed. Since you've found it, what is your restore height? You might need to lower it a bit, it depends when was the last transaction.
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