userdoc.md

@@ -10,6 +10,8 @@ There is one dependency:
 
 * Python3 pandas
 
+There also is an [optional dependency](optdependency).
+
 ### Windows
 
 Pandas is already included in the Python3 embedded in QGIS for Windows.
@@ -25,30 +27,6 @@ If you don't have administrator rights and pip3 is installed on your machine, yo
 pip3 install --user pandas
 ```
 
-## Optional dependencies
-
-CircleKill module can optionally produce topology dbf files if you install **dbf** Python3 module.
-
-### Windows
-
-You need to install the dbf module in the Python3 embedded in QGIS for Windows. For that:
-
-* Open a file explorer and go to your QGIS installation directory (something like `C:/Program Files/QGIS 3.10`)
-* Right-click `OSGeo4W` command file and select `run as administrator`.
-* In the freshly opened command line window, run those two commands:
-
-```
-py3_env
-python3 -m pip install dbf
-```
-
-### GNU/Linux
-```
-sudo apt install python3-dbf
-# OR
-pip3 install --user dbf
-```
-
 ## Install the plugin archive
 
 Open QGIS, go to "Plugins -> Manage and install plugins". Find the tab named "Install from ZIP". Browse your files to find the zip archive and click "Install plugin".
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