I'm not sure if this has been discussed already but here's something I discovered while trying to add my Nebraska Furniture Mart (NFM) credit card to Quicken.
I recently
asked if anybody knew if NFM was an institution supported by Quicken because I was unable to add it due to not appearing in the list of available institutions in the "Add Account" window.
The response was that NFM was on the file (C:\ProgramData\Quicken\Inet\Common\Localweb\Banklist\2019\fidir.txt) of supported of financial institutions and thus it should appear on the list when trying to add it. This didn't solve my issue because even though it was in indeed in the list in my computer, NFM didn't show up when searching for it in the dialog box to add a new CC.
I looked a little more into the file contents and noticed that, compared to other institutions that do appear when searching for them, the NFM entry had a field missing. The NFM row has 11 fields whereas the other ones, that do show up, have 12 fields. I obviously don't know what each field means, but it looks like the field in question has list of services available. Here's a comparison:
- Institutions with 12 fields have something like this in the 9th and 10th columns:
BANKING&WEB-CONNECT BANKING,CREDIT,ACCOUNTINFO&EXP-WEB-CONNECT
- Institutions with 11 fields just have something like this in the 9th column:
BANKING,ACCOUNTINFO&EXP-WEB-CONNECT
I tested this by trying to add accounts with 12 fields, and they all appeared on the list. I then tried to add accounts with only 11 fields and they didn't show up. I wouldn't be doing due diligence if I hadn't tried to edit the file

So I did, I added "CREDIT&WEB-CONNECT" to the "missing" field in the NFM row, restarted, and wouldn't you know it, it worked!

NFM showed up on the list, asked for my credentials, found my account and created the account with the correct information (limit) and balance!
Big Disclaimer: Now, this is all internal to the application, I'm not sure how it will affect the overall behavior and/or if it will cause problems from which I won't be able to recover. I am comfortable making these types of changes, and I made a backup of my files just prior to doing this, but still wouldn't recommend it because I'm not sure of any hidden consequences later. There's a reason why that entry was like that. I might even get banned from here :'( but still wanted to share my findings with the community in case anyone is having similar problems. It might help when troubleshooting with technical support.