After your healthy skepticism of my conclusion, I tried to recreate the issue, with some success, but it only leaves me more confused. Here what I've figured out, maybe someone can tell me what's going on. On the second load of my client, it crashes. It just vanishes right when you'd expect the menu to come up; logging in.... nothing.
I got to that conclusion by trying to recreate the original problem, I thought I had: I renamed my computer "a". Rebooted and loaded the client and it worked (I felt foolish), tried it again and it crash. Thought well, not so foolish. Renamed(longer name), rebooted, client loaded (felt vindicated), better try again and the client crashed. I'm frustrated again. Tried reinstalling after uninstalling with remove data option and deleted the client's directory, I still cannot get it to start but once then it requires me to disable my anti-virus to work. I even though Java protection might be the issue, so I only disable Java protection, but didn't help. I've got both faf-client.exe and faf_windowes-x64_2022_8_0.exe - FAF Client in my Whitelist. It does work once, and I've never had an issue with any other programs.
Don't know why the reboot on Renaming the computer helped the first time, b/c I've been fighting this all week and have been rebooting often. But I was so glad to final have a solution(not really) that i didn't want anyone else to be fighting with something that could easily be worked around, so I posted without checking more. Little embarrassed, b/c I always tell people to check twice before posting.
P.S - Both User Log off/on and rebooting can get the client to start once.
----===== Last lines of the Client.log ======-----------
2022-08-26 08:18:19.821 INFO 22496 --- [JavaFX-Launcher] com.faforever.client.steam.SteamService : Starting the Steam API
2022-08-26 08:18:19.937 DEBUG 22496 --- [JavaFX-Launcher] com.faforever.client.steam.SteamService : Steam API started
2022-08-26 08:18:20.292 INFO 22496 --- [JavaFX-Launcher] o.s.boot.SpringApplication : Started application in 4.691 seconds (JVM running for 6.331)
2022-08-26 08:18:21.307 INFO 22496 --- [JavaFX Application Thread] com.faforever.client.update.Version : fromVersion '2022.8' is not newer than toVersion '2022.8'. No update is required.
2022-08-26 08:18:21.310 INFO 22496 --- [JavaFX Application Thread] com.faforever.client.user.UserService : Logging in with refresh token
2022-08-26 08:18:22.764 DEBUG 22496 --- [reactor-http-nio-5] com.faforever.commons.lobby.FafLobbyApi : Starting session listener
2022-08-26 08:18:22.767 DEBUG 22496 --- [reactor-http-nio-5] com.faforever.commons.lobby.FafLobbyApi : Starting login listener
2022-08-26 08:18:23.045 INFO 22496 --- [reactor-tcp-nio-1] com.faforever.commons.lobby.FafLobbyApi : Connected to lobby.faforever.com on port 8002