Hi,
What version of Unity are you on exactly? I've tested this in Unity 4.0.1f2, 4.1.5f1 and 4.2.1f4.
What version are you running on - perhaps I've missed a version somewhere.
In any case, if you'd like to get running straight away while we resolve this, please edit the file (tk2dFontEditor.cs, line 160) and delete the lines as shown below.
bool IsTextureCompressed(Texture2D texture)
{
if (texture.format == TextureFormat.ARGB32
|| texture.format == TextureFormat.ARGB4444
#if !UNITY_3_5
|| texture.format == TextureFormat.RGBA4444
#endif
|| texture.format == TextureFormat.Alpha8
|| texture.format == TextureFormat.RGB24
|| texture.format == TextureFormat.RGB565
|| texture.format == TextureFormat.RGBA32)
{
return false;
}
else
{
return true;
}
}
Apologies for the inconvenience.