Have you seen Product Update - What you need to know?
Ensure the user account that is performing the Installation/Deployment (Windows user as well as user logged into Central Administration) is the Farm Installation account and that it is a Local Administrator on the Server you are installing on.
Installing Nintex Forms Enterprise Edition (optional)
Updating from previous versions
To update from previous versions of Nintex Forms 2013, download the NintexForms2013.exe file and save it to your server environment. Double-click the file and follow the guides and instructions in the installation script. All updates to the application and database will be applied.
Updating from 2.4.0 or later to 2.5.0
If updating from 2.4.0 or later to 2.5.0, the installer may display the following message upon completion. If you see this message, follow the instructions to manually retract the indicated solutions and then re-run the installer.
"The currently deployed Nintex Forms solution could not be retracted automatically. Open Central Administration and retract the solution NintexForms2013.wsp and NintexForms2013BackwardsCompatibilityUI.wsp (if available), then re-run this installer."
If you have chosen to not use Nintex Live or Nintex Mobile, the upgrade is now complete.
If you have previously installed and configured both Nintex Live and Nintex Mobile, the upgrade is now complete.
*If using Nintex Live and Nintex Mobile for the first time, please read steps below to continue and complete the upgrade:
If Nintex Live has not previously been used:
Establish a Connection to Nintex Live
The Nintex Live Framework requires a connection to the internet to communicate with Nintex Live.
Note: If your network requires a proxy server to access the internet, specify the server details in the “Proxy server” section. These settings are specific to the Nintex Live Framework and will be the only application allowed access to the internet.
Configure Nintex Live Forms
Note: Allowing anonymous form submissions may require Microsoft server internet licensing.
Nintex Live is already configured but Nintex Mobile is not
You can run the update .exe from any one of your Web front ends. After the update is complete you can verify the version update in Central admin > Nintex Workflow > Licensing.
Is there a way we can run powershell script to perform the upgrade? We have been trying to upgrade to the most recent version of forms for 2013 version 126.96.36.199. The upgrade through the wizard is unable to run successfully. It stays at the point where it stops the timerjobs, tries to create a job and then waiting and retrying forever..
This may be further indications that you have bigger problems with your Timer service. I would suggest to check the following to see if this is the case : https://community.nintex.com/community/build-your-own/blog/2015/08/26/tracking-and-resolving-stuck-workflow-timer-jobs . If you do have issues with the timer service, even using PowerShell it will not install. If you need assistance checking the health of the timer service please feel free to submit a support request so we can help take a look.
Please do check this https://support.nintex.com/SharePoint/Forms/2013/Unable_to_open_Nintex_Form_2013_during_runtime_afte... before planning to update. Just had to rush and sort out everything in one go but all good now.
Maybe this has been answered somewhere else - but i wasn't able to locate the answer:
Within the Nintex 2013 Workflow Release Notes (https://community.nintex.com/t5/Release-Notes/Nintex-Workflow-2013-Release-Notes/ta-p/87903) at the beginning of a new entry a SharePoint Service Pack / CU is being listed (amongst other details).
Does this mean that our SharePoint farm has to have this patch level (e.g. Dec 2018 for product version 188.8.131.52) in order for us to install the new Nintex Workflow version?