Yes, you need to extract the main BIOS body from the stock capsule via hex or UEFITool, then re-open that BIOS body in UEFITool and replace the stock BIOS region with the BIOS region I modified for you.
It’s easy to do, but not easy to explain if you are not familiar with all these BIOS regions and editing tools etc
Yes, I have CH341A 1.34 software, it’s in this package I always link - http://s000.tinyupload.com/index.php?fil…257455007472602
What are you testing it for, did you have some issue with 1.29 or others? If yes, what is your chip ID, maybe I know the version you need to use or if you need to use another software instead, or need to use different BIOS ID etc.
As for Win10, I only know that everything has issues in Win10, even windows has issues in Win10 
So I doubt that works there, I think I’ve seen reports it does not, so if you need to use CH341A and software I suggest you use Win7
Or, you can use ASProgrammer software, it does work properly in Win10 but it’s not as user friendly - https://github.com/nofeletru/UsbAsp-flash/releases/