First of all, make sure you installed the MediaTek drivers, they are available. and I tried them on Windows 10, should work. there are drivers for Win2000, Xp, 7 and Vista. and for 64bits. Ive run the one for 7/Vista succesfully on WIndows 10. You can check if succesfully if you connect a turned off watch will be detected as Serial com (very brief, it will switch to storage device.) most of the time COM3, but I dont know the magic byte.

Open Flash_tool.exe, you can find it in the archive "FlashTool_v5.1420.00 Azeem" for example. Ofcourse you need to extract that first

Open the tab "Read Back"

Press "Add" (this will add an file that you would like to read back to your PC, you could for example read certain regions, or the whole firmware)

The program now expects you to give it a name where you want to save the read back information to. Dont worry, we are going to set the region.
Leave the name or call it whatever you want. Please keep your backup somewhere save. This is what you can use to unbrick failty watches with... drivers and settings are all correct in this one.

Here we go, Start Address is fine, remove the 8 and add a 4. So make it look like 0x00400000. (ive read somewhere 0x01000000 would be the whole device, but that was for the official U8, we have a clone) (most)All "Russian" and XDA tutorials use this 3megabit size. Who cares, I would dump everything if the phone doesnt crash :D use a hexedit or so to slice it later

Before you do anything else. Is you watch OFF? else, do so.
If you want to make sure, connect it to your PC, the watch should display a battery charging icon.

Disconnect it if its off and press the read button.

You could wait 2 seconds or just connect the Watch and it should read your specified ammount of bytes from the watch, resulting in your firmware backupped (just make sure, take a peek with an hexeditor)