Ok.
Based on what you and I have read, it seems your issue was caused because an intermediate build like 2.2.17011 was skipped.
If that’s the issue, this is what I would try after confirming you have the correct hub:
A) Download this file → HN1T-14G381-SA - SYNC 3 APIM Software (IVSU) Database - CyanLabs , which is 2.2.17011.
B) Download this file → JR3T-14G381-AX - SYNC 3 APIM Software (IVSU) Database - CyanLabs, which is 3.0.20204 (your current build).
C) You need to manually create an update USB (as with the ford’s update). Create a folder named SyncMyRide on the root. Place the 2 files from A and B inside that folder, do not extract them, just copy them. To be safe, make sure no other package is inside that folder, so that only these APPS (sync3 versions) packages are located there.
D) Create a text file named ‘autoinstall.lst’ on the USB’s root, make sure the extension is LST and not TXT.
E) Edit the .lst file with this content:
; 2.2.17011 install
[SYNCGen3.0_ALL_PRODUCT]
Item1 = APPS - HN1T-14G381-SA_64817.tar.gz
Open1 = SyncMyRide\HN1T-14G381-SA_64817.tar.gz
Options = AutoInstall
F) Connect the USB to the car, that should install 2.2.17011. Unplug the USB once it’s done.
G) Once it’s installed, as you can image you need now to go back to 3.0.20204. Edit the autoinstall.lst file with this content:
; 3.0.20204 Install
[SYNCGen3.0_ALL_PRODUCT]
Item1 = APPS - JR3T-14G381-AX_1599788486000.TAR.GZ
Open1 = SyncMyRide\JR3T-14G381-AX_1599788486000.TAR.GZ
Options = AutoInstall
H) That should install 3.0.20204 once again.
So, if your issue was caused by skipping 2.2.17011, that should fix it.
I’m applying the same logic that with 3.4 that versions can be interchangable.