Add troubleshooting section to Readme

Fixes #21

Readme.md

@@ -6,31 +6,55 @@ Browse, stream and download Monstercat Songs, powered by the Monstercat API and
 
 ## Usage
 
-[Download](http://monsterutilities.bplaced.net/downloads?download)
+[Download](http://monsterutilities.bplaced.net/downloads?download) or use the GitHub releases.
 
 > This is a pre-Release, you may encounter bugs. 
 If you do, open an issue here or send feedback from inside the application. 
 The latter will automatically include logs, which reside in `TEMP/monsterutilities/logs`
 
 To run it, you need to have Java 8 by Oracle installed on your computer.
 
-Read the initial guide and follow the tooltips. Improved user-friendliness is in development ;)
+Read the initial guide and follow the tooltips. 
+Improved user-friendliness is in development ;)
+
+### Troubleshooting
+
+#### connect.sid
+
+For downloading and listening to the latest Track, your `connect.sid` 
+needs to be entered in the bottom of the Downloader. It is a cookie that
+identifies your Monstercat Account. Here's how to obtain it:
+
+1) Log in on [monstercat.com](https://monstercat.com) and ensure that you have a valid Monstercat Gold subscription
+2) Go to your browser cookies and search for `connect.monstercat.com`  
+   [Quick link for Chrome](chrome://settings/cookies/detail?site=connect.monstercat.com)
+3) Find the content of `connect.sid`. It is a string starting with `s%3A` and has around 90 characters.
+4) Copy that string into the `connect.sid` Textfield at the bottom of the Downloader.
+
+#### Downloader
+
+Sometimes, the cache runs into issues and that may contribute to issues in the Downloader.
+Simply disable the cache, restart the application and enable it again.
+
+> If you still have issues - no problem! 
+> Hit me up on [Discord](https://discord.gg/ZEusvHS) or send Feedback directly from the application!
 
 ## Screenshots
 
 ### Catalog
 
-The Catalog provides an overview of all Tracks ever released on the label and extensive possibilities of filtering them.
+The Catalog provides an overview of all Tracks ever released on the label and 
+extensive possibilities of filtering them.
 > Tip: You can customize which columns to show by clicking on the `+` in the top right
 
 ![Catalog](assets/screenshots/catalog.png)
 ![Catalog filtering](assets/screenshots/filtering.png)
 
 ### Streaming
 
-In case you missed it in the other Screenshots: There's a player on top that can stream any Monstercat track, 
-just like the website. Double-click on any piece in the Catalog or Downloader to load it into the Player!
-
+In case you missed it in the other Screenshots:  
+There's a player on top that can stream any Monstercat track, just like the website. 
+Double-click on any piece in the Catalog or Downloader to load it into the Player!
 ![Player](assets/screenshots/player.png)
 
 ### Downloader