I would renew it - because here, it is extremely more difficult to start over than to renew. It's possible you might never go back, but if you do, and if something changes that sends you back sooner (who knows, maybe a new opportunity will open up?)... then you're covered.
I also would look at it as a chance to look at where your girls are now, which can be really useful information in planning your homeschooling.
If they receive accommodations for testing etc, that's useful too - even if they aren't using them now. When they are older and applying for SAT etc accommodations, having the record of accommodations helps.
Best wishes,
polarbear
