No. you can not upgarde from version 3, and 4 because we provide each software to install individually. This is the new version and all systems in this version is completely different from the previous version and we recommended you to uninstall previous versions before installing this software.
We provided 2 languages(fonts). English and Myanmar.
There is no problem for Service Pack 1. We fixed that bug in Service Pack 1 but it can easily to be done for early Beta version by installing 3 different font types in Typing Tutor's Font folder in C:\Program Files\.. from windows font installer.
It seems to be same but we fixed bugs of ealry version of David Ba Con English Myanmar Typing Tutor 5.02. There is no major changes for both 2 version. All features are same.
You can order by mail, email or phone. We will give our
bank account information for money transfer. As soon
as we got your transferred money, we will ship this
software with license agreements. Remark: we will
not ship on Saturday and Sunday.