First you need to setup ionic .
Once you are done you will find a folder names src in your ionic project .
refer : http://prntscr.com/jseqx5
Please open it and remove all the files and then :
then download the wplms ionic app package from codecanyon .
You need to copy all the contents(where app,pages folders and index.html file are) from ionic_src folder and then goto ionic project -> src folder and paste all the contents (app,pages folders and index.html file) in it .
If its hard for you you can probably order your customization here : http://wplms.io/app/app-customization/