Yida Lin

@cbrnr I looked into the Qt source, however in the README it suggests mingw32-make? 

@cbrnr I agree that a 64 bit build for Windows is a must. Since MinGW is not available for 64 bit I agree we should try VC. But the result...

@cbrnr Thanks Clemens. By the way, here is a [project](https://sourceforge.net/projects/qt64ng/files/qt/x86-64/) providing pre-built Qt MingW 64 bit. Unfortunately it's a bit outdated and the newest Qt Version it provides is 5.5,...

@cbrnr Hi Clemens, I am trying to compile a 64bit SigViewer but apparently seems I need a 64 bit libbiosig for windows first: not sure how I can do that....

@cbrnr Unfortunately still the same as last year. I might try the second option later. We could also consider cross compile from Linux... 

@cbrnr Hi Clemens, I just noticed that the 64-bit build was never uploaded to the release page :)

@cbrnr Except I really wanted to include the auto-updater! I think somebody posted a very good idea, that you can use Qt Installer Framework internally without launching its GUI, which...

@LenaHdk Hi I have the Windows 64bit [SigViewer](https://drive.google.com/open?id=1LDyvISJfQQ4rtID8hGDpwmxZ78bzFsgp) which Clemens sent me earlier

@cbrnr Yes Clemens, maybe put the 64bit in the 0.6.1 release so that people can download it as needed? I think the code is exactly inline with 0.6.1.

@brylie Thank you for reporting this problem. Looks like we have some problems in the exporting function. But as far as I know, the convertion function between different formats is...