All versions of this app have had their own particular problems. The developer is a one-product hobbiest — and there's nothing wrong with that given the app is free. But, no, he doesn't support the product very well.
JBid suffers from one problem in particular that makes it dangerous. It suffers from a gross overflow that only appears after a large number of files (auctions) have expired. It works fine for a while, but after it accumulates enough data it becomes weaker, finally stalling the whole system (common to java) and corrupting files along the way. The new 2.0 beta is no different. Either the developer doesn't know about this or he is ignoring it.
This is a beta. It has ALWAYS been a beta. That said, it is not in the same class as other beta programs out there, where once in a while something doesn't work right. Use it at your own risk. That's what beta means.