Licencing question Aspose.PDF 23.12.0 is not working with Aspose .NET version 10.9.0

The version of Aspose.PDF we use is 10.0.9
We bought a new licence as it was running out and this version 23.12.0 is not working with Aspose .NET version 10.9.0 is there anyway around this or keep the old version of Aspose.pdf but that is causing a message Evaluation Only, could this be removed some how?

@AnthonySA

There is no way you can use two versions of Aspose.PDF in single application. Can you please share why you want to keep using both versions when you have license for the latest release? Please share what type of issues are you facing so that we can further proceed to assist you accordingly.