Bug Fixed.

Fixed the biggest problem: When downloading in bulk, the time is wrong, and there is a problem with the file type

V2.0 发布！

修改了bug，筛选功能全部ok的。没啥子问题
官网https://www.cs3cx4g.cn/gnss

basicly finished with gui!

win_single_file.zip: just a single exe file in it.
win_muti_file.zip: a folder contains the exe and libs.open gnss_downloader.exe to start.

Linux and Mac versions just coming soon.