Hello,
Yesterday I faced with the bug in Nintex workflows: attempt to start workflow manually brings to launch non actual (old version) of this workflow.
I.e. most recent version is v92, attempt to launch workflow manually brings to launch the workflow v24.
Remediation steps from my side :
1. Export most recent of the workflow from the designer mode to the HDD.
2. Delete the workflow from the site.
3. Open the link http://[teamspace_address]/NintexWorkflow
4. Delete the folder named as your workflow (i.e. if workflow name is myWorkflow, then you need to delete myWorkflow folder]
5. Open the Nintex designer, import and publish workflow with the same name.
And these steps did not bring any result.