Hi Matthew,
We are sorry for the inconvenience caused.
We have a known licensing issue with the version 7.3.0.20 and we posted the solution in the below forum post.
http://www.syncfusion.com/support/forums/general/89063/fix-for-runtime-error---%22license-has-expired%22-(even-when-correct-license-is-installed)Also, please ensure the following steps once you applied the patch before running your application.
In the patch provided in the above forum post, The core assembly version should have the dated as 17th July whereas other assemblies with other dates like 10th July. If you keep the assemblies in application bin folder, please ensure that you have replaced with the new Syncfusion.Core assembly. Or if you keep the assemblies in GAC, please try running Assembly Manager and install new Syncfusion.Core assembly from precompiled assemblies folder into GAC.
2. Remove Obj & Bin folder of your application and recompile it.
3. Now, run your application and it should work for you.
Please let me know if you still face any issues.
Regards,
Vijay