...
Upgrade your Power Scripts and SIL Engine version to 5.8.0.0 or higher
Using the new download feature, export all the scripts from you Server or Data Center instance. See this page for additional details.
Install Power Script for Jira Cloud on the new Jira Cloud instance you want scripts migrated to
Open a help desk ticket using this link: https://appfire.atlassian.net/servicedesk/customer/portal/11
In the ticket, provide the URL of the Jira Cloud instance
Upload the script files created in step #2
...
.
From the application server running Jira, create a zip file of the silprograms directory found in the Jira Home folder.
From the Jira Admin > Apps > (Power Scripts) Self Helf page, upload the zip file to the new cloud instance.
All of your scripts from server will now be migrated to the cloud.
...