The folder exxist, however Appdata is a hidden folder.
is C:\Program Files\Bitcoin "block data-adress"?
I bought BTC via Safello, they switched from Segwit to Taproot - is there any wallet I can download and send the $30-worth off BTC there instead? Armory seems to advanced for me.
If you understand how to use the armory wallet you won't get any problem. If you are a newbie next time use only the lite version of wallet like Electrum.
Anyway, if you want to get the BTC from the armory the fastest way is to export the private key from your wallet and import it to any wallet like Electrum as a sample.
You can find the export under menu>wallet properties>backup this wallet you can use follow this post below.
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https://bitcointalk.org/index.php?topic=5060053.msg51188797#msg51188797