So the real feature request sounds as "don't lease the IP address to the host with the installed local-administrated bit in address". Sounds interesting, will reconsider this.
MAC addresses ranges are allocated just per-vendor and rather randomly. To be honest, I don't understand where one can use ranges. Do you want to block all Realtek devices, but to allow all Intel ones? Sounds strange.
1. Do you really use profits of the autoregistration in this case? Maybe it's enough just to turn it off?
2. This request can be considered in the future, thanks.
Could you please tell us what features of the fourth version do you need?
We don't upgrade because transmission 4.0 uses C++ inplace of C, and consumes significantly more CPU, RAM and flash storage.
Wrong size of the drive is the Windows' problem, we can't fix it. But of course, for the file with the size of 100 Mb everything should be ok. Do you encounter issues with the files of that size?
Log entries seem to be unrelated.