is Firewerks software safe?? what does it help me with can i find files i used it once and found that when i restarted mt computer the files were gone is this expected what should i have done differently??

I am not sure when or how to use Fireworks what can I do with it what files open do I need Photoshop ... how do I use Photoshop??

when I don't know how to save a file what user tips have been found does adobe have a help page??