Hello Folders,
I just thought I'd pass by and leave my nugget here. This issue happened to me only twice and I couldn't find anything on the internet specific to what I was experiencing. This was with the 7.5.1 client - I haven't experienced it on the newer one. Not to say it's not valid for it, I just don't know.
Steps to produce: Get a certain special mystery kind of crash, power on PC, start the client and nothing happens. No web GUI. No taskbar icon. Nothing running in the background. Totally unresponsive. The mouse cursor changes for a split second like it's about to load but then ... nothing.
My first attempt to fix was to uninstall/reinstall, and that didn't fix it. Second attempt was to uninstall and delete the AppData/Roaming/FAHClient folder, then reinstall. This did fix it, but it did create some other issues.
The second time this happened, I found that the config.xml file (inside the AppData/Roaming/FAHClient folder) was absolutely blank. After deleting it, the FAH Client loaded up with a default config and everything was fine after reconfiguration.
I did not manually edit anything or otherwise tinker with the files. I did fruitlessly attempt several times to disable the Web Gui on startup, but not sure if that is part of the cause.
Aside: I've managed to reduce my crashes to almost none strangely by reducing the airflow in my case. Using MSI AirBoost Vega 64. This thing seems more stable at 82C than 77C.