I have recently download the new pages, but from time to time my computer will revert back to the previous page software what can I do to fix this problem

does anyone have a problem with the new page software? I am currrently running into the same problem with the old pages software re-appearing and any document that I had used with the new update, will not open. The system requires me to attempt to download a new version of page, when the newiest version has aleady been download and has been in operation.
What can I do to fix this problem? I desire to use the new version at all times.
Please help

You just have to be particular with which Pages version you are opening the document. use Right click on the document and choose the right version of Pages.