I can not understand WHY upgrade/downgrade can't be done inbetween different product groups.
This is a MUST HAVE!
Group 1
-- Product 01
-- Product 02
Group 2
-- Product 03
--Product 04
Now if a client need an upgrade from product 01 (Group 01) to product 03 (Group 02) ... it CANT be done!!!!
This is unacceptable, this should be possible!!!
What can I do in the meantime???
This is a MUST HAVE!
Group 1
-- Product 01
-- Product 02
Group 2
-- Product 03
--Product 04
Now if a client need an upgrade from product 01 (Group 01) to product 03 (Group 02) ... it CANT be done!!!!
This is unacceptable, this should be possible!!!
What can I do in the meantime???