I've patched the binary to remove block count limit (I'm using it for small 200k word dict though, not sure if it really works with larger dicts) and seems to work for me (TM). I've also tried to remove the 4kbyte entry limit, though not sure if successfully (I don't have dicts with defs this long to test).
https://drive.google.com/file/d/1uRx...Q-_cm-QO1r-PX/