Skin Maxthon3 in Maxthon 4 in Skins Posted 11 Mar 2016 9 hours ago, 7twenty said: MX4.9 needs the entire skin in the 0.dat file to function, unlike previous version where only the modified files are needed in the .mxskin file. So you'll need modify an MX4.9 skin with the files from the MX3 skin that you want, and then need to ensure that everything works, as it probably won't due to some changes. The simplest method is to extract the mx4 0.dat file then merge the mx3 skin files into that folder, only updating the files with the MX3 you require. But that won't work as there's quite a few differences in some files that need to be added as well. As i said above, unless you know HTML/CSS and have the time, it's not a case of just of adding a few files to make it work properly. Good afternoon. I know html & css, but I do not understand - how to take 0.dat and how to decode it? Where is he (0.dat) is on my PC?