Inspiron 15 5582 2-in-1, SupportAssist problems

I have an Inspiron 15 5582 2-in-1, running Microsoft Windows 10 Home. I have two problems with Support Assist.

1) SupportAssist has never run properly on my main login on my laptop. It shows the blue rectangle, and spends some time, apparently looking around. Then it exits. In Event Viewer, we can see, for example,

Error 9/6/2020 11:21:10 AM Application Error 1000 (100)

Faulting application name: SupportAssistClientUI.exe, version: 3.6.0.0, time stamp: 0x5efcb534
Faulting module name: Windows.UI.Xaml.dll, version: 10.0.18362.997, time stamp: 0xe85f9394
Exception code: 0xc000027b
Fault offset: 0x0000000000713500
Faulting process id: 0x2d90
Faulting application start time: 0x01d6846158c2fac5
Faulting application path: C:\Program Files\WindowsApps\DellInc.DellSupportAssistforPCs_3.6.6.0_x64__htrsf667h5kn2\SupportAssistClientUI.exe
Faulting module path: C:\Windows\System32\Windows.UI.Xaml.dll
Report Id: 70022250-2577-499c-8c0b-bff970e0b3c9
Faulting package full name: DellInc.DellSupportAssistforPCs_3.6.6.0_x64__htrsf667h5kn2
Faulting package-relative application ID: App

I have tried uninstalling and reinstalling.

The only thing I know of that might be unusual about my setup is this. In the initial setup, microsoft chose to truncate my email address (jeboyce56) to 5 characters to put my files under c:\Users\jeboy. This is not an acceptable shortening of my name. (jeb, jboyce, and jeboyce are all acceptable; I find jeboy to be offensive.)
So I found directions for getting an acceptable name for my folder. I created a local account, and then did registry stuff to associate it with my microsoft account. My files are now under C:\Users\jeb.

2) I can run SupportAssist as a different user, admin, with a local account. It asked me to complete my profile, which I did. It seems mostly to work. However, it shows my support contract as running out real soon now, rather that as extended for 2 more years.