My wallet frozen too. A few day before, I sync but wallet freeze at block 253400. I tried reindex, erase chain, upgrade to newest version, but still not sync.
So if you have tried to upgrade to latest version and biblepay wallet still dont work for you i would say make some backup of your wallet.dat in %appdata% / biblepay folder then you can just uninstall the entire wallet and the biblepay folder at appdata directory then install latest version of biblepay wallet and insert your old wallet.dat file so you dont loose your accumulated tokens.
Thats just an idea , but it would be intresting to know the reason your biblepay wallet dont sync so i recommend that you contact Rob, he is the main developer and knows his things, he can for sure give you some bucket list for debugging.
You can write on your issue on link below, explaining in detail your situation, Rob is a helpful fellow
https://forum.biblepay.org/index.php?topic=517.msg10423#new