If you installed StockSolo using Adobe Exchange, you don't need to do anything, the extension will update automatically.

If you installed the extension manually:

1. Download the Anastasiy’s Extension Manager from this link http://install.anastasiy.com and install it.
2. Download the StockSolo extension from this link: Download.
3. Open the Anastasiy’s Extension Manager.
4. Drag and Drop the “StockSolo.zxp” inside Anastasiy’s Extension Manager.
5. Follow the installation steps.
6. Restart the Adobe CC applications that are open.