Troubleshooting: Add comment about getting the VIM TOC plugin working

Troubleshooting.md

@@ -1,6 +1,35 @@
 Contents
 ===
 
+<!--
+This Table of Contents (TOC) is generated using the `vim-markdown-toc`
+plugin for VIM from
+<https://rderik.com/blog/generate-table-of-contents-with-anchors-for-markdown-file-vim-plugin/>
+
+You first need to install vim-plug as per
+<https://github.com/junegunn/vim-plug> . This can be as simple as:
+
+    mkdir -p ~/.vim/autoload
+    curl -fLo ~/.vim/autoload/plug.vim https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
+
+Minimum ~/.vimrc to get this working:
+
+----------------
+call plug#begin('~/.vim/plugged')
+" Create Table of Content from Markdown files
+Plug 'rderik/vim-markdown-toc', { 'branch': 'add-anchors-to-headings/drc2r' }
+" Initialize plugin system
+call plug#end()
+" Vim markdown Table of Contents
+let g:vmt_insert_anchors = 1
+let g:vmt_auto_update_on_save = 1
+----------------
+The above will mean the TOC is updated on each file save.
+
+To manually remove just use :RemoveToc
+
+Then to add it back :GenTocRedCarpet
+-->
 <!-- vim-markdown-toc Redcarpet -->
 
 * [I ran the program with "run as Administrator" and ...](#i-ran-the-program-with-quot-run-as-administrator-quot-and)