Today I had to reinstall Windows 10 on machine 1. Before I deactivated Nitro Pro 11 license 234600-xxxxxx-xxx487 for that machine. After install W10 I could not install Nitro again. Problem the same as described here: I followed the steps given by Support in that topic. After using the msi-installer Nitro was installed succesfully, but the activation not; it ended up with the well known 23 error. It looks like that the cleanup tool or de msi-installer corrupted the licence and activat