is the data remains secure after downgraded

[Stichting voor Kennis en sociale Cohesie]

Hello, We are SKC,

We have a Jira subscription, and I accidentally purchased a premium subscription. It was a free trial. My employer had apparently already reverted the subscription to the old version, but I canceled it.
My employer reactivated it, but we're wondering if the data remains secure, even after 60 days now that we've reactivated it. 

[Dan Breyen]

Hi @Stichting voor Kennis en sociale Cohesie welcome to the community.  Based on how I read this Atlassian Security  article, your data is secured regardless of whichever license you are using.

This article also describes some permissions and work-level security with the Free plan.

I found an article from riskimmune which also compares the security differences across the licenses.

Hope that helps