Software can occasionally have bugs—this is an inherent part of development. There was no dispute that the bug has been present for some time and needs attention. I completely agree, and I have followed up on it for you. In fact, we are hoping that it will be resolved in the next release. However you asked if v4 has been forgotten about, given we are working on v5. This is clearly not the case.
Bugs are prioritized based on several factors, including the upcoming release, available resources, the impact on the software, the number of users affected, and more. Unfortunately, there’s no straightforward answer I can give, as it really depends on situation at the time, and the bugs themselves.
With regard financial loss. The software is provided "as-is", as per your end user agreement. We has logged a bug report, as per above, and you have also acknowledged there is a bug within that particular area that is causing you issues. Until we state this is rectified, this would still be the case.