patterns in zip

I have downloaded some free patterns and they are all in ZIP folders  that I can not do anything with. I wanted to buy some patterns, are they in that ZIP also, because then I will not buy them as I can not open the ZIP folders. I hope someone can give me an answer for my question. Thank you.

normally all zip folders can be open on a pc. click on right mouse then you find "extract to" and the folder will be unzipped. if you pc has no programm , so download an zipper programm. google "zip program" and you will find some for free
:)

You can also contact designer and ask to send you PDF-file :-)

First sorry I do it in English, I am from Holland, can read German, but not write it. Thank you Myriam13 and Mybabydesigns for your answers. I succeed to open the files and then turn them into PDF but find it not an easy way. This are the first patterns I ever found that are send this way. So probably buy them in PDF Will definately look at your site Mybabydesigns. Thanks