one month donation-one week

http://community.elgg.org/plugins/401957/1.8.1/donation?annoff=0

pimply put, I'm using the Donate plugin to track paying members (because no working membership plugin exists)

how can i change its code to ''Months donations are valid''

to Weeks donations are valid?

 

I want it to count in weeks, instead of months. how is this possible?