Broken built tools in android SDK manager (missing aapt.exe )

Question

I am using eclipse from a couple months and it was working fine until Avast antivirus alerts me that
appt.exe in sdk built-tools is not a secure program. I did not delete it but it seems like Avast deleted it automatically!

Now Eclipse is throwing this error:

I opened my SDK manager and it shows a broken build-tools

What is the best thing to do in this case without affecting the rest of resources?
Is it recommended to uninstall the build-tools then install them?
I know this might seem as an easy problem but a small mistake might cause losing the whole projects

Answer 1

You just need to reinstall Broken Build-Tools Package, revision 21.0.2

1. Select Broken Build-Tools Package, revision 21.0.2
2. Click on Uninstall button Right-Bottom side

Restart SDK Manager
Now, Broken Build-Tools Package, revision 21.0.2 will be available to install.

1. Select Andoird Build-Tools of particular revision
2. Click on Install button Right-Bottom side