If you've never used SiQreg before, just sign up to buy it like normal. The payment form will tell you if you qualify for a free trial or not.
On the trial your card won't be charged until your trial is up. And you can cancel anytime before the trial is over by sending an email to
thesiqsoft@gmail.com saying you want to cancel.
If you don't qualify for a trial on the payment form, send me an email with your stars username and I'll check it out.