Answered direct by email - but for others reading ...
First thing - the DefaultDevice setting should match one of the DevName fields (in this case TV) or be left blank.
With GBPVR in partcular ... I noticed earlier in this year that GBPVR now defaults to using SQLite as its underlyng database rather than an MS-Access mdb file.
This is a problem for DABDig because I don't know how to access SQLite from VBScript for free.
Luckily you can still manually configure GBPVR to revert to the old way of working by editing its config.xml file
(although this facility might be removed in future versions of GBPVR).
Paul WebsterDABDig creator