​I have been using RPFM 4.2.7 for a couple of years and have successfully created two fairly simple mods for WH3, (for the Dwarves and High Elves), where I have only changed a few values in Unit values.  

Now, trying to create another mod (for Bretonnia) a couple of months ago, I find that RPFM won't open up anything. I can create the name of my new (Bretonnia) mod, but that's as far as I can get. Doesn't put the (empty) new mod in it's usual box ready to create a DB. Also RPFM won't open up any Pack files in the game Data folder, so can't pick units to mod.

I've tried deleating totally RPFM and downloading it again, but doesn't make any difference.

Creating the first two successful mods I closely followed the tutorial, and found it quite easy. Everything was / is in place that is needed, so why won't RPFM work properly now.

I've tried using PFM 5.2.4 as that will let me open up Data/DB.  But can't access many of the DB files as it obviously doesn't have the lates schemas.

I will be very grateful for any suggestions.

I'm using RPFM everyday, it works fine, at least for NTW.

Try reinstalling, checking the configurations for game folder, and use the update functions to have the latest schemas.

Oh dear!  Panic over Steph.  Having another look inside RPFM I discovered that I'd somehow (accidentally) toggled "Toggle PackFile Contents" off.  Toggled it "on" and as if by magic, everything could be opened up again!  Then only took my a few minutes to create the (small) mod for Bretonia.

Thanks again Steph for your interest.