just fixed it too.
1 uninstall all java
2 reinstall java 32
3 reinstall java 64

hi

i got eh same problem.
I use file bot since at least 1 year, under windows 10 64. I've deinstalled /reinstalled java 64 to be sure ... still can't rename files.
My files are on a nas, i'm connected via a network disk (with a letter in windows) sorry for my bad english