Update Readme.md

Readme.md

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 ###INFO: The last version that works in CS5.5 and CS6 is v3.36###
 
-## To Install from ZXP ##
-- Select latest release from [releases page](https://github.com/TomByrne/Flash2Svg/releases)
-- Install with Extension Manager (or [ExManCmd](https://www.adobeexchange.com/resources/28))
-
 ## To Install from Adobe Add-ons ##
 - Go to the plugin page at [Adobe Addons](https://creative.adobe.com/addons/products/7232)
 - Click the 'Free' button to install
 
+## To Install from ZXP ##
+- Select latest release from [releases page](https://github.com/TomByrne/Flash2Svg/releases)
+- Install with one of the following tools:
+  - [ZXPInstaller](http://zxpinstaller.com/) (recommended)
+  - Extension Manager (installed with Adobe applications)
+  - [ExManCmd](https://www.adobeexchange.com/resources/28)
+
 ## To Use in Flash CC / Adobe Animate ##
 - Open panel through menus, Window > Extensions > SVG Animation
 - Open the FLA you wish to use and navigate to the timeline you wish to export