Not a complaint, just an FYI in case it happens to anyone else: For some reason TweakableEverything stopped working, so instead of reloading the game, I saw that shiny Reload Database button and decided to click it. When I went back to the VAB, 90% of my parts had disappeared from the catalog, including most stock parts. They still showed as researched in R&D, but didn't show at all in VAB/SPH. Panic ensued, tried restarting the game, tried reverting to an old save, tried starting a new game, tried reverting to older and latest MM, but nothing worked. Then I read a few pages back that you had to click the Dump Database to File button after Reloading the Database, which then marked everything as unresearched, which could be fixed with Research It All. That also didn't work, but I noticed when going into the VAB it would show the parts for half a second then they would disappear when an editor mod (in this case Part Catalog) loaded. Going into the settings and re-autotagging all parts didn't work, so I quit then re-installed Part Catalog, and I finally had all my parts back for all my saves.