There is an issue with DVR 17.4.5 and external plugins:
From what it seems this is related to the usage of a custom format container that is used to send video- and audio data over to the main voukoder application. But this issue is not limited to voukoder only, it is happening with other external plugins (i.e. MainConcept, etc) as well. I tried to investigate it but as of today it seems this is a bug inside DVR.
As a workaround please reinstall version 17.4.4 or it revert using a Windows system restore point.