Hello,
The patch from March is not available. You may download either official release at http://www.stimulsoft.com/Downloads.aspx or the latest prerelease build at http://www.stimulsoft.com/ReportsNetDownloads.aspx .
Thank you.
Creating reports and dashboards | Stimulsoft community forum
Reporting tool and data analytics tools for creating reports and dashboards in ASP.NET, ASP.NET MVC, .NET Core, Blazor, Angular, PHP, Python, WPF, JavaScript, and Java applications.