Unfortunately, downloads are still stalling with cache = 0 in 6.70 final.
As far as I can tell, this is not the case with virus infected files. Just when downloading regular rar/par2 file sets.
Sometimes NewsBin stalls just after 1-2 hours. Even when cache is set to 2000.
Once that happens, even Help->About does not help - even though cache is increased back to 1500 or so, NewsBin stalls again after just minutes.
So, unattended downloading is not possible. Closing and restarting is needed several times a day.
If that problem cannot be solved, perhaps it is possible at least to detect it and to "restart" Newsbin automatically, preferably without closing open groups, i.e., an "internal restart" if possible. If not - a real full automatic restart. It would at least allow an unattended downloading - like it was possible with 6.55.
If somebody does not like it, it could be enabled/disabled in settings.
For full automatic restart, it is important to use the same specific path to the .exe file (because various different versions may be used) and the same .nbi file.
I often run at least two instances of NewsBin (sometimes different versions) with different .nbi files (pointing to different data locations, so there are no conflicts with headers or various other db3 files)
Those .nbi files are never the same as detected while installing Newsbin.
So again, restart with the same exe and with the same .nbi and do not close other/wrong NewsBin instance or all instances. But better to "restart" internally, if possible
OR PERHAPS:
Can you find out why once cache goes to 0 and downloads stall, further Help->About have only very temporary effect? Perhaps you could fix that.
Then, catch all suspicious exceptions and clear the cache. Perhaps an option in settings - to clear the cache on all exceptions. But that would work only if clearing cache really works.
Currently, it seems that there is another issue that goes together with cache = 0. Help->About only clears the cache but does not reset something else that has to be reset or re-allocated.