:-: **If it is not installed or the path is not correct, when we click “tool chain panel”on the main software interface, as shown in the following figure, it is all the serial numbers.** :-:  ***** ``` ToolChain_RT809H.exe It is a self-extracting file package, just unzip it. ``` :-: **Installation step：**  Move the mouse over this icon, double-click the left-click, or right-click to select Open to start the installation  Click “Unzip ``` Note： if you are not familiar with 【Path】 do not modify it at will. ``` :-:  ``` If installed, there will be prompted to select “All yes”or “Cancel” ``` :-:  Choose all Yes to continue unzipping  When the unzipping is complete, the interface automatically disappears ***** :-: **From the main software interface** **Click the "Tool chain Panel"** :-: The figure above illustrates a successful installation ``` Note: if the interface does not change, please shut down the main software and then reopen it. ```