Yes, the version that is in use for your application now was obsoleted some time ago. The new unit, a V6, has a new programming environment, MAPS, and will require conversion of your old program file.
The MAPS environment does have a conversion feature to take the old file from the LinkBox format to the new format.
This is the product page for this KNX to BACnet gatway:
You will find the manuals available here, but also a download link for our MAPS program under Configuration Tool. This is available free of charge, so you could get it and begin your program file now.
Once it is downloaded you can get to the home page and you will see a place to import your Linkbox file…