No, you don’t have to delete the work folder. If you’re already using the custom FBW version, you don’t need to delete the a32nx folder inside the community folder. Just run the installer and click update and it’ll replace for you.
But I think it’s still always a good practice to delete the A32NX folder from the community from time to time. Especially when there’s a major update being deployed. It’s just better to clean up junk files and install a fresh one to make it as compact as possible without having old files conflicting with the new.
But you don’t need to delete the a32nx in the package folder with the work folder inside. If you want to, you can just backup the throttleconfig.ini file or the contents inside. Once you reinstall a fresh copy, just replace it with the backed up one. That works too. But it’s not necessary.
The EFB tablet is currently only working with SimBrief. I had a go at it, and it works fine. But I personally don’t like it because it requires too much effort from me setting up the flight plan properly to make it work in the sim. I usually plan my flights according to my mood and looking at the world map, looking for which airport I want to depart and which airport I want to go to. While also checking the total flight duration, making sure it’s still within the duration that I want.
With SimBrief, I can’t have that visualisation. I need to already decide which airport I want to depart from and arrive to, and I also have to know the ICAO code to put it into SimBrief. It’s good for a proper flight planning because you get flight briefing and all the documentation that’s generated. But it doesn’t suit my flying style of just picking a place that I fancy from the world map and just click click using the GUI and I can fly within 2 minutes of setting things up. Those other stuff in Simbrief is just too much and too serious for me.
So while I wouldn’t be able to fully utilise the EFB because I just don’t like using SimBrief and the Link MCDU button isn’t working yet. I think it’s a nice step and I’m looking forward for its usability for non-SimBrief pilots.