IDC 0 Report post Posted December 20, 2017 The Installation Wizard is stopping abruptly during v. 10 installation. The error message is "22 - wrong license number." The correct license number is being put in and i can't uninstall the Trial version. HELP! Quote Share this post Link to post Share on other sites
Kelvin V. 0 Report post Posted December 20, 2017 Hi @IDC, Thanks for posting on our community forums! Error 22 means the serial number you are trying to activate is for a different version of Nitro Pro. Please uninstall your Nitro Pro 11 using this clean up tool: http://install.nitropdf.com/support/downloads/cleanup.zip Then download the latest version of Nitro Pro 10 from here: For 32-bit http://install.nitropdf.com/pro10/en/retail/nitro_pro10.exe For 64-bit http://install.nitropdf.com/pro10/en/retail/nitro_pro10_x64.exe Once installed, activate your Nitro Pro 10 using your serial number. I hope this helps. Cheers! Quote Share this post Link to post Share on other sites
IDC 0 Report post Posted December 21, 2017 Kelvin: Thank you and it appears to have worked. I need to activate the downloaded version, although under "Help" i do not see the activate option. IDC Quote Share this post Link to post Share on other sites
Alex E. 0 Report post Posted December 22, 2017 Hi @IDC, From the Help menu, select 'About Nitro Pro'. This is where the Activation option resides. Quote Share this post Link to post Share on other sites