Download v1.27. Delete your Glidos folder. Install v1.27. Go to the web site and unlock.

I buyed version 1.25, will the unlock still be working on 1.27?

Yes. When you log in to the unlock service on the web site, you will see a list of previous GlidosID's for which you have unlocked. Your current ID should be amongst them. You can click the button to the right and regenerate the unlock code.

Another way is to keep a copy of the file Authority.txt from the Glidos folder, and replace it after reinstalling.

Hi,
It works! I've updated Glidos but.....I installed texture pack (caves) and added a new line in the file glidos.ini. When I starded the game this is what I see:http://members.home.nl/marion.fransz/tomb1.jpg
I have the graphig setting on normal. What is going wrong??

Not sure. I think I changed the way texture packs work between 1.25 and 1.26 so you may need to redownload the caves levels. Still what you are seeing shouldn't happen.

What Graphics card by the way?

The NVIDIA Geforce2 mx/mx 400. I will try a new download and reinstall them.

I downloaded the beta-caves-v126, but don't I need the version 1.27? Where can I download this version?

No. I don't think I changed the override feature between v1.26 and v1.27

It works! I installed the texture pack again and now it looks great!! Thanks a lot for youre help and when can I expect a new level...😀

That's not me. You'd need to ask Matthew about that.