We're currently working on transitioning to another payment service, as MyCommerce, the service we've been using since the start of LLBLGen Pro back in 2002 (then SWReg, later on transformed into MyCommerce after being bought by Digital River). Transitioning isn't easy but we hope to do this as soon as possible.
We've migrated our site to PayPro Global. If you run into problems purchasing, or errors when purchasing, please let us know asap so we can have a look.