1.Are there any way to set fix date for recurring. eg. every 5 of every month,
No, the closest can get to this is "This calendar month", but you can't specify what day of the month it should begin/end on.
2. Any function that can make admin do manualy payment with backend? I use this software for club and need payment and print invoice.
Sorta, you'll need to first configure the offline gateway. Once done navigate to a users profile on frontend then go through the subscription process using the offline gateway you've configured. Next you can pay the basket from frontend. If you try to give a user a subscription from CB > User Management then it completely bypasses the payment process so there's no basket to pay.
No support?
Sorry for the delay, it's a very busy time of the year. We'll be "in and out" for this entire week spending time with family and friends during the holidays.