Thank you all, in turn, for your replies, which I appreciate.
Metta, I'd like to know what you're testing - thanks for asking.
You know this forum and its etiquette much better than I do; if you think that our continued discussion regarding a third-party app would wander too far from TB-related matters to be held on this forum, please just email me at firstname.lastname@example.org to discuss that information.
If it turns out that we can loop import-export or data-format details back into this discussion ("here," on this forum), we can always return to this thread and continue this TB-related I/O-and-format discussion. I defer to you and Harlan regarding which subject matters belong here, and which do not.
Wherever we ought continue this discussion (again, your call), I am always interested in PIM/task/contact/document management/knowledge management, etc. platforms.
In order not to lose momentum, I will hereinbelow begin a discussion of Contacts (etc.) management, ...which discussion can be continued wherever it ultimately "belongs":
I've been trying to get organized since all we had was a stack of punch cards, and I remember the excitement I felt when we got early personal computers that could run tools like VisiCalc and dBase III.
I was frequently the only tech-oriented co-owner of my various companies or partnerships, over the years, and it usually fell to me to pioneer the selection and implementation of hardware, software, networks, and communications tools.
I tested and/or bought at least one of just about everything, for a while...built PC's, became a Novell network administrator, became a dealer for a lot of hdw and sfw vendors, and could code some of the really early languages.
It quickly became evident that I could not do or learn everything, so I hired network and tech-support specialists. I am not currently a competent coder, but I can usually follow or contribute to techie discussions in one way or another.
One of the first things we all probably did when we entered the tech arena in any capacity was to build a list [sic] of our contacts, to-do's, etc.
I kept my first Contacts List in a basic text list, and for a long time, I managed to keep all of my Contacts straight as I moved between and among then-favored or then-leading programs (applications, apps, ...whatever you want to call them).
Sadly, years ago, I carelessly uploaded thousands of accumulated contacts (which at that moment were at least semi-organized) from my local Outlook .PST "up into" Google Gmail's "Contacts," not realizing what an inexcusable mess that was going to create.
I stubbornly kept piling new information into that Gordian knot, just because I was busy, and because I just "knew" that Google was going to improve their Contacts functionality, over time. Not so much!
I still don't understand why the supposedly-greatest data-organizing company in the world (Alphabet) can't manage at least a simple flat-file database of Contacts better than they do.
Google's habit of creating new Contacts for me from...pretty-much anything or anyone I visit or communicate with...irritates me no end. Of course, I realize I could probably use the Gmail Contacts tool better - but I don't care.
Meanwhile (can you relate to this?), it doesn't help that every communications carrier or social-media platform pounces on me continuously, asking me to allow them to access (aka: "copy and exploit") all of my Contacts.
General note to Verizon, AT&T, Facebook, Instagram et al: regarding the question of my allowing you to access my Contact: no thanks!
Alas, I realize most of them will eventually glean most of what they want from me/us, anyway. We have to protect our data perfectly, all the time, while they only have to penetrate our defenses, once. It's an asymmetric battle.
I recently started a fresh Contacts file with a humble app called FullContact. Once I populate it to my satisfaction, I may reluctantly move my Contacts back into Microsoft Outlook, though I hope I can still use Google Calendar, which I like.
So...having said all that...I thank you for your offer to discuss PIM's, etc., and look forward to continuing that discussion with you as dictated by time and the arrival of new information...wherever this discussion should continue.
In the end, I hope I can loop all of this information back into the then-latest version of TheBrain, since it would seem to make sense to do so.