Davor's PHP Constructor installation is as simple as copying files to desired location - and tends to remain as simple as that. When you receive/download/purchase ZIP pack, simply create a folder where you want program to reside, and unpack all files from ZIP there. Take care to recreate subfolder 'doc' as integrated help will search for help files exactly in subfolder named 'doc'.
There is no (yet) special installation routine for installing Davor's PHP Constructor, because it requires only two (one) files to function properly.As soon as you start the program for the first time, it will create several working files. If related option is set, it will also create backups of any files changed in editor and store them in the same folder as original files.