Answer:
For this, you must modify the registry.
Open the registry and navigate to: HKEY_CURRENT_USER\Software\Microsoft\Internet
Explorer\MenuExt Expand "MenuExt" and you can see that many of the contents are in the IE right-click menu.
If there is "Thunder Download Link" or "Thunder Download All Links" after expansion, select "Thunder Download Link", double-click "Default", enter your Thunder path and then add "geturl.htm", Generally speaking, it looks like this. It needs to be modified according to the specific situation: C:\Program
Files\Thunder\Program\geturl.htm. Double-click "Contexts". The default base is hexadecimal. In the numerical value Enter "22" for the data. If you choose decimal as the base, enter 34 for the numerical data.
If there is no "Thunder Download Link" after expansion, right-click "MenuExt", select "New → Item" in the pop-up menu, enter "Thunder Download Link", and double-click "Default" in the right window , enter the path of Thunder plus "geturl.htm", and right-click "New → Double-byte value (ie dword)" in the right window, enter "Contexts", double-click this "contexts", click "Decimal", enter "34".
In this way, you will find that the "Download using Thunder" option has been restored in IE's right-click menu.