how-to-setup.md

 Below are step-by-step instructions for setting up the 2D-InSAR VPI ArcGIS toolbox.  
 
+## 1. Remove old installation: 
+If you have an older version of the vpi-toolbox installed already, remove the toolbox from ArcGIS: 
 
-## 0. Update ArcGIS: 
-Make sure you have updated ArcGIS to 2.5 or higher. 
-
-## 1. Download source codes: 
-[Download](https://gitlab.itek.norut.no/jakob/vpi-toolbox#releases) the VPI toolbox and unzip it to a path of your choice, from now on referenced to as `C:\path-to-vpi-codes\`. 
+Also, remove the old vpi conda environment, by first open `Start` > `ArcGIS` > `Python Command Prompt`:
+<details><summary>Show screen shot</summary>[[resources/how-to-setup_python-command-prompt.png]]</details>
 
-<!---
-## 2. Update/create PYTHONPATH environment variable: 
-Click `Start`, type: 
-```
-edit the system environment variables
-``` 
-and press Enter. Click `Environment variables...`. If the variable `PYTHONPATH` exists in the list: 
- - Click `Edit...`
- - Click `New`
- - Type the path to where this repository was downloaded (in step 1). 
-
-If the variable `PYTHONPATH` does not exist in the list: 
- - Click `New...`
- - In the field `Variable name` type: 
-```
-PYTHONPATH
+In the command prompt, type:
+```bash
+conda deactivate
+conda remove --name vpi --all
 ```
 
- - In the field `Variable value` type: 
-```
-C:\path-to-vpi-codes\
-```
-i.e. the path to where this repository was downloaded (in step 1)
--->
+## 2. Update ArcGIS: 
+Make sure you have updated ArcGIS to 2.5 or higher. 
 
+## 3. Download source codes: 
+[Download](https://gitlab.itek.norut.no/jakob/vpi-toolbox#releases) the VPI toolbox and unzip it to a path of your choice, from now on referenced to as `C:\path-to-vpi-codes\`. 
 
-## 2. Create ArcGIS Conda environment: 
+## 4. Create ArcGIS Conda environment: 
 Open `Start` > `ArcGIS` > `Python Command Prompt`: <details><summary>Show screen shot</summary>[[resources/how-to-setup_python-command-prompt.png]]</details>
 
 In the command prompt, type (where `C:\path-to-vpi-codes\` must be changed to the path to the vpi source code as of step 1):
@@ -49,7 +34,7 @@ Activate the environment called "vpi": <details><summary>Show screen shot</summa
 
 Restart ArcGIS Pro. 
 
-## 3. Add the toolbox to your project
+## 5. Add the toolbox to your project
 After restarting ArcGIS Pro, go to the catalog pane: <details><summary>Show screen shot</summary>[[resources/how-to-setup_add-toolbox.png]]</details>
 
 Left-click `Toolboxes`, click `Add Toolbox` and select the file: 
@@ -57,5 +42,4 @@ Left-click `Toolboxes`, click `Add Toolbox` and select the file:
 C:\path-to-vpi-codes\vpi.pyt
 ```
 
-
 The 2D-InSAR VPI toolbox should appear and be ready for use: <details><summary>Show screen shot</summary>[[resources/how-to-setup_added-toolbox.png]]</details>