Aligning documents stops halfway though - but workaround app not valid for Studio 2017

Hi, I'm running alignment on a large file and it stops halfway through. I suspect it is due to the sheer size of the file. I see that the workaround is to split into several SDLXLIFF files and then merge them together. However, the app to do this does not apply to Studio 2017. Could anyone advise whether I can still use this app, or if there is any other solution to my alignment problem?

The app is: www.translationzone.com/.../sdlxliffsplitmerge-827.html

Thanks very much, 

Laura