# of installs when upgrading from nitro pro 11

[jmoeller]

I currently have nitro pro 11 on 3 computers.  If I upgrade to the productivity suite, will I still be able to install in on all three of those computers?

[Allain Umailin]

Hello @jmoeller,

Thank you for reaching out to us through our Community Forums!

Could you please check your three machines if they have the same Nitro Pro 11 serial number? You can find this out by clicking on 'About Nitro Pro' under the Help tab.

I am asking for this information this because as per your account records, I was able to see that you have purchased a single user license. A single-user license can be used on two machines as long as you follow the rules outlined in our End User License Agreement (EULA):

'Licensee may install one copy of the Licensed Software on a single computer. The primary user of the computer on which the Licensed Software is installed may install a second copy of the software for his or her exclusive use on either a portable computer or a computer located at his or her home, provided the software on the portable or home computer is NOT USED at the same time as the software on the primary computer.'

Thank you very much in advance and I am looking forward to hearing back from you.