Upgrade center page not found cs cart 4.0.2


I installed cs cart 4.0.2 and used the store import tool few days ago, I'm still customizing the design so the import process is not finish.

I noticed today cs cart 4.0.3 is out and wanted to install before continuing customizing to be sure everything works correctly, but it seems that I cannot access the upgrade center.

I'm getting “page not found error”.

If it happens to anyone or if someone know a solution to this it would be welcome.

Thanks in advance for any answer.