Hi, Pablo:

You can follow the instruction on how to build from source code:

Building from sources

It’s not that complicated. I use NetBeans to compile the code, but if you follow the instructions closely, you should be able to compile also.

You can find the “ui/src” folder, once you manage to git clone the source code. It’s there in the instruction too.

Good luck. Feel free to ask, if you are in doubt.

Juniarto