I currently have version 3.0.14 and I want to upgrade my store to 3.0.15, which is the latest version. I downloaded this: 3.0.14_3.0.15_ChangedFilesOnly.

The read me says to:
1. Take a full backup of your existing stores files.
2. Upload all the files in the /uploads/ folder over the files currently used by your store.
3. Upgrade complete.

Now, the problem is, I have tons of mods. In previous upgrades that I know of, there has been a detail description on how to upgrade the cc if there is mods. So how can I upgrade cc if there are mods on here?

Thanks

With each upgrade, there is a Changelog directory in the package. This gives you what you need to upgrade a modded store fairly easily.

You just upload the files that haven't been modded, and then mod the files that have been altered. The changes listed in the changelog will upgrade your store as needed.

I dont have a 3.0.14 to 3.0.15 in my upgrade folder
And there is no in the download area, sorry my ignorance but where can i find the file?

It could be because you have to login twice on this forum - Once for the forum, and again for the downloads and support ticket areas.