Install the app from the Atlassian Marketplace
Setting up the app:
After the app is installed, you also need to add the custom field “Team Versions” to your Jira Issues fields. You follow these instructions:
Add a custom field
Select [Site Settings] > Issues.
Under FIELDS, select Custom fields.
Find “Team Versions”, then […] and select “Associate to Screens”
Select all screens and save (to get the field on all projects)
Creating your first version:
visit the version manager.
click the “Add version” button.
Now the version is available to add to your issues.