Hi,
I will help you to find the MSN Explorer repair tool. Please follow these steps. Open C:/ Program files(x86) >> MSN >> Support >> Self heal >> MSNRT (MSN Repair Tool).
For assistance with MSN Explorer you can also follow the below link to contact the MSN Technical support team.
https://support.microsoft.com/en-us/contactus/msn/explorer-tech-services/
Thanks
MSN Support Team