There's about 20 database files in my folder. Most are o.k. (can change data). Two of the files get the "not modifiable" message now when trying to change a field content. If I move the file out of this folder and onto the desktop then I can modify the field contents.
I've checked Filemaker permissions. There's no difference between the files that are o.k. and the files that aren't. Same thing with Windows file permissions. All was fine before the update.