Remove or change product License info

[Obelix-it <nb@xxxxxxxxxxxxx>]

Hello. I'm having the following problem.

I've started to use Software products API in order to package a software 
for distribution.

After some problem, everithing goes fine, i've succesfully created the 
pakage and do some save/erstor etest.

Now, i need to change some of the assumption i made when i call QLZADDLI 
APi (mainly, Default Usage Limit and Grace period).

I tried every way i can think to get the changes done, but the parameter 
don't change. I've done some google, and understand that removing the 
package won't remove the license, but what at least i need is to be able 
to change information.

I tried deleting the whole package, including Product Definitiona and 
product load, and rebuild from scatch, but even if call to QLZADDLI with 
new parameter ended succesfully, when i package and restore the product 
i find the old one's.

Does anyone may help or point me in the right directoin?? is there any 
different API to change/remove lic info?? does i need to remove all of 
the object referring to the program in order to get the license change???

Thanks.