Hello Yiannis,

I suggest you to to completely uninstall and reinstall.
The previous installer contains the same build version assemblies and scripts with current installer.
They only have different date released. Currently, there is no option to upgrade or only replace your existing scripts and assemblies. 

Regards,
Handy

Yianis,

You have to perform complete re-installation for "installer" level changes such as service pack, or major updates to several components across platforms.

For "hotfix", you can simply launch Update Manager and there's no need to perform re-installation for that. 

Let me know if you have any questions.

Thanks,

Jimmy.

Thank you