How to extract a webvisu page from tp 600 pio1 wp

hi
lately we Wana add some modification lines in our web visu page in our hmi TP 600 10.1 1280x800 PIO1 WP but we dont have the source project so is it possible to extract the project from the online project

The runtime is compiled, so without the project source code its not possible to make changes to it.