I just did a quick search and found that the library problem that i have is indeed a known bug > Overwriting an existing material name with a new material name will not save the new material name and the old material name is gone too. This bug does not happen when you only overwrite the description (which is the 2nd input field).
Another ‘bug’ might be that when you input new material with lower case letter, it isn’t put in alphabetic order with materials that start with a Capital letter (or vice versa). It’s not a major thing, just have to scroll way down if the material isn’t where I expect it to be, but is it easy to solve?
Any idea when the next release will be, with this bug fix?