Update 'README.md'

README.md

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 Instantly connect your (or someone else's) dumb Windows ass to the Yggdrasil Network on demand, with single `.bat` file, no brains required.
 
+![run as adm](_launch.png)
+
 ## Requirements
 
 - Windows 10 version 1903 (May 2019 Update) or higher
 - Network connection
+
+## Usage
+
+- Download [`plugmein.bat`](https://inex.dev/lnkr/plugmein.bat/raw/branch/master/plugmein.bat)
+- Right-click it
+- Run as administrator
+- Congratulations!
+- Your Yggdrasil network address has been copied to the clipboard, you can share it with someone, e.g. to get help through SSH/VNC/RDP
+
+Client window looks like that, green text means that the connection was successful.
+
+Close this window to disconnect.
+
+![cmd windows](_cmd.png)
+
+## How it works
+
+To connect to Yggdrasil network, it uses [Popura](https://github.com/popura-network/Popura) - Yggdrasil network client fork which adds several features, including [autopeering](https://github.com/popura-network/Popura/wiki/Autopeering), which kinda makes this whole story zeroconf.
+
+It also downloads and unpacks [Wintun](https://www.wintun.net/) - Wireguard TUN driver that Yggdrasil uses to create virtual network adapter.
+
+Downloads handled through [bitsadmin](https://docs.microsoft.com/ru-ru/windows-server/administration/windows-commands/bitsadmin), unpacking is done by `tar` (which has been [added in the Insider Build 17063](https://docs.microsoft.com/en-us/virtualization/community/team-blog/2017/20171219-tar-and-curl-come-to-windows), in the same patch that added `curl`, which would help a lot, but those sons of bitches broke it a long time ago and aren't interested in fixing it)
+
+## Uninstalling
+
+Just delete `plugmein.bat` and `plugmein` folder which was created alongside the `.bat` when it was first started