If I'm updating to 1.17, will it keep every Aristoi's option (like alts, pinned mods, mods config, etc...)
If yes, then I'll switch to 1.17 as soon as possible ^^
Not by default, but its very easy to move over all of your settings. Copy .minecraft/libraries/EMC/1.16.4/configs to EMC/1.17.1/configs
Like it mentions, it cannot correctly download the guava file, possibly because your computer is blocking permissions to download it. You either need to manually download it and place it in the specified directory, or find a way to allow it to download (probably via firewall or antivirus).
It might help also to delete the old corrupt file from .minecraft/libraries/com/google/guava/guava/21.0/ (this is where the new file should manually be placed).
You can download the donor client by logging in at https://aristois.net/login and then going to the download page. Then click "Donor Edition" and install it as normal.
Select your amount and type in your official mojang account username. You cannot donate with a cracked account.
It will take you to Stripe to complete the donation. Debit/credit cards, google pay, apple pay, and various bank transfer options are available. We do not support paypal or paysafecard, however visa gift cards may work.