illegal creativity?

[viktoras d.]

I am about to complete a database tool (commercial) and "suddenly" 
remembered license terms of one commercial database prohibiting creation 
of tools capable to import databases created with their product into any 
other database system.

Although this export/import was not a purpose of my program I wanted to 
add this as an additional feature. Now I am not sure if it is legal at 
all? Or is it? Or it depends?..

concerned
Viktoras