Flat rate is common in broadband access to the Internet in the USA and many other countries. A charge tariff is a class of linear rate, different from the flat rate, where the user is charged by the uploads and downloads (data transfers).
MUI stands for Multilingual User Interface and .dll.mui files are simply libraries(Dlls) that contain resources dedicated to localization : for an application to support multiple languages,dlls containing specific resources must be available eg language resources(arabic,french,english,chinese....
VBE7.DLL is a type of DLL file associated with Microsoft Excel 2010 developed by Microsoft for the Windows Operating System. The latest known version of VBE7.DLL is 1.0.0.0, which was produced for Windows. This DLL file carries a popularity rating of 1 stars and a security rating of UNKNOWN.