IsoView incorrectly says it is unlicensed

Hello, we distribute our software with IsoView 7.0 (for reasons too in depth to go into, distributing a later version is not an option currently, nor is making installation optional). We have a customer that has Arbortext Editor 6 which fails is IsoView 7.0 is active on their machines. They have found they can get it back working by running Regsvr32 on their IsoViewX73.ocx but when they run our software IsoView always shows the text "UNLICENSED Arbortext Isoview".

What can we do to

A. fix up this customer's issue?

B. prevent graphics in our software saying they are unlicenced when the customer upgrades to a later version of IsoView?

thanks in advance

Dave