Upgrade from standard

Hi Guys.

It would seem that a lot of commands are missing (disabled) from the standard version of Draftsight.

Layer merge being one, along with a block sync etc. Also I have noticed I cannot now create custom toolbars.

Fairy basic command I would have thought.

I suppose it is a method of forcing users to upgrade.

Is there a list of commands that are functional of not functional in each version.

As a retired user and not using the product for profit I would like to keep expenditure reasonable. 

Anyhow can I and how do I upgrade my subscription??

Regards Allan