Unable to change anything after moving the cms directory

[chromis]

To be on the safe side of things, I installed the cms system in the directory judo.ruhosting.nl/katja/GetSimple. After everything was working, I moved the directory to judo.ruhosting.nl. Not everything was working, so my brother performed a deep-search to remove the old directory and to refer it directly to the root of the website.

Now that I/we have done this, we cannot make anymore changes on the website. If I make a change, it cannot be saved. The permissions of the folders are okay though. Does anyone know how to fix this? I'd hate to have to go through the trouble of having to reinstall everything. Any help would really be appreciated.

Thanks a lot for reading this and for thinking of a solution. If you need any more information, please feel free to ask.