updated bootstrap link (navcoin#27)

updating link to proper bootstrap file.  Also added note about common error if download or extraction fails.

content/NavCoin Core/Bootstrap your wallet.en.md

@@ -1,21 +1,25 @@
 ---
 title: How to bootstrap your wallet?
-date: "2020-09-14"
+date: "2021-04-28"
 order: "030"
 ---
 
 ### Bootstrap
 
 A boostrap for the wallet can be downloaded from:
 
-http://ds1.nav.community/bootstrap.tar.gz
+https://bootstrap.nav.community/bootstrap.tar.gz
 
-NOTE: this may take some time as the blockchain is around 4.7GB in size
+NOTE: this may take some time as this file is around 3.3GB in size
+
+Once downloaded, you will need to use a program like winzip (tar/gunzip on linux) to extract the blockchain folders from this file.
 
 You simply need to replace the `chainstate` and `blocks` folders inside your NavCoin data directory with the ones from your bootstrap.
 
 To find the data directory please see [this article](/navcoin-core/locate-your-data-directory/)
 
+NOTE: If you get the error `error opening block database, do you want to rebuild the block database?`, this would indicate your download failed or the file did not fully extract.
+
 ### What is “Bootstrapping”? 
 
 Bootstrapping is the process of adding a pre-synced blockchain from a trusted source to your wallet, allowing you to skip part or all of the blockchain syncing process.