wintermute

I think you are referring to GNU Taler.

It recently started operating in a kind of open beta in Switzerland https://news.itsfoss.com/gnu-taler-swiss-operations/

Unless I missed that feature, no, you only have one version.
But it creates a link to archive.org so you can see if there's older versions there.

You have two things, the application and the libraries.
The libraries are files with the data you want to host (wikipedia, stack overflow, etc).
There's a lot of applications for different platforms. Some allow to download the libraries directly, otherwise you can download them manually into a folder and tell the app where to find them.

Yes! It saves it as HTML, readable HTML, PDF and image.
Results can vary a lot depending on how the page is implemented. Sometimes most of the formats are empty or broken, but I always got at least one that's usable.

The official website has a lot of good resources. You can burn the firmware into the devices directly from there.

I have Kiwix (offline versions of Wikipedia and other online resources) and Linkwarden (preserve specific websites in multiple formats) running on my home server.

Also, free speech in the US doesn't mean that there are no consequences for whatever your say, it's only that you can't be censored before you say it.

He probably thinks that the entire application is only one source file

I think BLE is only required for the initial compromise (extracting the pairing key). After that the attack can be performed over classic BT, and can impersonate either part (headphones or phone) to the other.
It's still very targeted and sophisticated, so no reason to panic unless you have reasons to think someone with the resources could target you.
Regarding the attacks, they go way beyond eavesdropping calls, since BT headphones usually have access to contacts and smart assistants, that you can use to extract a lot more information

This works really well. I also open the downstairs windows. The hot air going up and out creates a draft effect, sucking in cold air from the downstairs windows.

Every frickin day... at least once, I read a post's title and start looking around for clues that it's not real... My mind goes: "is it the onion? Is it April's fools again already? This can't be true..."

Username also checks out.