Hi
Try and uninstall it again.
When you reinstall, install the 32 bit version, and don't install it to the same location.
I can't tell you that this will work for sure, but often things will be left behind from old installs that interfere with new ones.
Installing it to a different location makes Windows not see it as the same installation.
And I've seen a number of people who say that they have had issues running the 64 bit version in Windows 10.
Check out this info relating to a fix involving replacing the .dll file.
Upgrading to Windows 10 breaks MySQL workbench?
Mike