diff --git a/README.md b/README.md
index b975742..b164e07 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 ## About
 
 This is a node script extracting E-Books from Amazon Kindle Cloud Reader.
-Useful e.g. for being able to read on devices where the Clour Reader doesn't work and for having a copy in an open format.
+Useful e.g. for being able to read on devices where the Cloud Reader doesn't work and for having a copy in an open format.
 Works with Chrome/Chromium. Other browsers use different formats for the WebSQL file where the E-Books are stored for offline use.
 
 Code is from this gists:
@@ -13,15 +13,20 @@ I have just added minor usability improvements (e.g. cmdline switch for input fi
 
 ## Usage
 
+This was successfully tested with nodejs v6 and v8 (will print ugly warnings with v8).    
+Doesn't work for me with nodejs v10 (and reportedly also not with v11).
+
 <pre>
 npm install
 ./main.js --help
 </pre>
 
-You just need to figure out the file to which the ebook was stored. As an example, in my case that was `~/.config/chromium/Default/databases/https_lesen.amazon.de_0/2`
+You just need to figure out the file to which the ebook was stored. As an example, in my case that was `~/.config/chromium/Default/databases/https_lesen.amazon.de_0/1`  
+If you have installed the browser as snap package, you need to first check where that snap is mounted (e.g. with `mount | grep snap`).
 
 Of course the ebook needs to first be downloaded for offline use:
-Go to the `library` view in the cloud reader App, right click the cover, click `Download`.
+Go to the `library` view in the cloud reader App, right click the cover, click `Download` (if you don't have that option, you may not have the cloud reader extension installed).  
+If an ebook was opened in the browser, but not downloaded, the sqlite file will exist, but not contain the content necessary for export (and this script will thus fail).
 
 ## TODO