I have the license for Aspose.Total and do not find a way to download the latest Aspose.Total DLLs. There are option only for downloading the trail copy.
This is to update you that Downloads section has been discontinued. You may download the latest versions of Aspose APIs from nuget.org. Please visit NuGet Gallery | Packages matching aspose to download the latest versions of Aspose APIs. You can see the latest release notes of the APIs at https://downloads.aspose.com/. Further, Aspose Downloads section will also point you to latest versions of the individual APIs at NuGet.
Regarding your license and trail version issue, you have to set the license in your code before using any functionality of Aspoe API. For example you are using Aspose.BarCode API from Aspose.Total product family. You have to set the license in the following manner.
CODE:
Aspose.BarCode.License license = new Aspose.BarCode.License();
license.SetLicense("Aspose.BarCode.lic");
Hope the above information helps. Feel free to contact us in case of any query or comments.