ArcCatalog 10.3 Crashes when opening the toolbox window after ArcHydro Installation

[TaylorHolt]

Since installing ArcHydro (for ArcGIS 10.3), ArcCatalog 10.3 crashes once I try to open the toolbox window.  I have reset the application profile for ArcCatalog, ArcMap, and ArcToolbox and it has not solved the issue. I have also uninstalled and reinstalled ArcHydro several times, even in different locations but ArcCatalog continues to crash.

[JayantaPoddar]

How about repairing ArcGIS Desktop? 

[TaylorHolt]

What do you mean by repairing ArcGIS Desktop?

[JayantaPoddar]

Start the setup.exe from the ArcGIS Desktop installation media. When prompted with the option of Modify/Repair/Remove, choose Repair and follow the steps.

[TaylorHolt]

I tried it but it didn't work. Thank you for the suggestion!