Could you, please, advise me on how I can find a workflow that has been assigned to Releases?
My former colleague put a script to release button in Releases and now we should change a logic: need to add a separate button to the Release page and re-assign this script from the release button to new.
As I'm not a Pro on Atlassian products I can't find how I can add a separate button and where is a workflow for Releases. Please, assist.
Releases in Jira do not have a workflow, they've got a simple open/released/archived flag to give you their status.
Some of us represent them as issues, and hence create an issue type of "release" which can then take on a standard Jira issue workflow (and we usually do some coding or scripting to tie them to the Jira release they represent)
I suspect that you do not mean "workflow", and you really mean "script". I am guessing that your colleague has written an app, or used something like Scriptrunner to add a button which then runs a process on the release.
I'd start with a look in the Admin -> Manage apps - do you have Scriptrunner in there? If so, look for "script fragments", as that's how buttons get injected.
I'm not quite sure I fully understand your problem, but you can identify the Workflow associated with your "Releases" the following way.
Let me know if it helped,