It appears totally illogical to push Complete purchasers into a cul-de-sac with no reasonable option to move upto Infinite/Xstream..........why not just ask the difference in price plus a labour cost (e.g. difference plus $50 as previously suggested).

If e-on wish to diverge their products & service into two distinct categories, i.e. 'general-public' / 'professional-studios', I believe that it would be a wise business decision. Unfortunately the current situation does not strike me as the correct way of achieving this.

In my opinion there should be a logical, hierarchical range of products (Complete & Infinite are too similar) where there is a logical upgrade/sidegrade price between all products (perhaps limited to a two generation 'lifespan') which avoids any potential for clients feeling marginalised.

All individuals and businesses can then upgrade/sidegrade as they wish and when they wish (within the two life-spans limit, i.e. an upgrade price from Infinite 6 to Infinite 8, but not from Inf 5 to Inf 8....) according to their desires & circumstances (which can change very quickly!).

I would suggest to e-on that they are then at ease to focus their software subscription services to the professional studios: A yearly fee for each Infinite or Xstream seat entitles you to quick always-available support, and all upgrades/updates released during the year automatically provided as part of the subscription. This subscription model appears to works well for my provider of architectural software (ArchiCAD).

P.S. Just my opinion, but I find Vue Infinite reasonably priced for the complexity of the programme - the cost of ArchiCAD with the necessary additional software for it to better realise its potential is not far off 10x more expensive!