Ah, I cannot tell you how grateful I am that someone picked this up! And you're doing a great job.
I noticed a mistake; you neglected to allow Technomancers to take Focused Concentration. If I find more I'll edit this post to include them as I try to translate my character to this program. When I ignored creation rules to do it anyways (I'm transfering a character anyways, I'd break money/karma limits) it seems that you just have to buy it multiple times. I know in Chummer 4 it was listed as a different quality for each rank.
The electrochromic clothing modification doesn't appear for my Armor Jacket. I can see how you'd not think to allow that, but from what I can tell in the book it should be able to be an upgrade for armor with it.
The YNT Softweave mod seems to be a bit glitchy. It seems to be adding the bonus twice in two different spots. For example, when added to my Armor Jacket (12) it then displays it as Capacity 18 (24 remaining).
Data chips are accidentally ten times as expensive as they should be. The price listed in the book (5¥) is for 10 of them. Other RFID chips are probably similarly mispriced, I didn't check.
The Colt Inception has 1 more RC than it should have. The book lists it as 1(3) from Electronic Firing and a Bipod, but Chummer has it as just 4 instead of 3.
Horizon Flying Eye is listed twice under Microdrones.
Gasp! Thank you SO MUCH for not removing the "Hacked" option for software. I use it as a houserule for skillsofts ('cause it was possible in 4th) and it's not actually in the rules for 5th yet.
I seem to have too many free knowledge points. It's (INT + LOG) x 2, I seem to have gotten (INT + LOG) x 3.
The Sensor Housing and Sensors don't seem to work; when I try to purchase them, I get an error message. There also didn't seem to be a way to add a sensor to a vehicle.
That's all I encountered transferring my character. Of course, once the character was "created" there was a bunch of stuff off but... Believe me, I understand how big of a task it'll be to more or less wipe all the outdated calculations for a created 4E character and put in the new 5E ones. What you've managed so far is great though. I for one really appreciate that you're putting the work into this for the Shadowrun community. I'm sure the forums will sing your praise for this, no doubt!