Can't add name into "MMD Material" information

[Jatts-Art]

My Blender is v2.78 on Windows 10 (as well as on Windows 7 until a few months ago). I've been working on my own model for quite some time and almost finished, this plugin has been a huge help! But once in awhile I notice a very annoying issue where, for some reason, I'm prevented from making changes and/or adding text into the top slot of where the Japanese name would go, as seen here:

When typing anything new, it automatically undoes it when clicking out or pushing enter, although it lets you delete text but that's it. The thing is, by default its completely fine and I am able to add whatever I want, but this issue only happens randomly whenever it feels like it. Even more bizarre is that once this happens then it stays that way unless I reload a previous save. This has happened about 3 or 4 times now where I have had to reload old saves to make it stop doing this and thankfully it hasn't caused any loss of progress. Reloading the plugin doesn't do anything either, it must be with a new save or if I create a brand new model listing (thus losing morph data which is a big no no).

I like to have all my model's settings prepared ahead of time before exporting as this means less I have to edit/change afterward. While it is a minor issue, its still annoying enough to piss me off and since this has been multiple times I feel I should mention it here I suppose!

[powroupi]

@RecklessJames, thanks for reporting this issue, I believe there should be an error message in the Blender system console when this issue happens, please paste it here, the error messages can help us to fix it easier and quicker. Thank you. :smile:

[powroupi]

Okay, I think the issue is fixed now (it was caused by the empty material slots), you might try latest mmd_tools: https://github.com/powroupi/blender_mmd_tools/archive/dev_test.zip :)