Problem when upgrading from 1.8.3 to 2.1 (Thesis 2.1 does not activate changes)

Hi there,
I have upgraded from thesis 1.8.3 to 2.1:

1.- Download Thesis 2.1 to my local drive
2.- From within WordPress (Thesis 1.8.3) I upload Thesis 2.1 zip (Themes installation page).
3.- Activate Thesis 2.1 but it does not work. It seems to be ok but I realize some functions lack in the dropdown menus.
4.- Download wpc_thesis file to my local drive. It is supposed to solve installation issues.
5.- Upload (through fillezilla) unzipped wpc_thesis files (boxes, packages, skins, master) to my server: wp-content/thesis as stated in DIY (this folder is different from wp-content/themes/thesis where Thesis 1.8.3 folder is and where Thesis 2.1 seems to be installed in a folder named thesis).
6.- Once I activate Thesis 2.1, it seems to be ok (the missing dropdown functions appear), but when I make changes (link colors, one or two colummns,…) nothing happens. Thesis 2.1 does not activate the changes I make.
7.- Upload to wp-content/themes/thesis the 1.8.3 custom folder. I change the file permissions for “cache” from 755 to 775. I change the file permissions for layout.css from 644 to 666.
8.- I activate again thesis 2.1 but nothing changes.

It seems to be upgraded, it seems everything is in its place but nothing happens when I try to change link color, column number, content width, sidebar width,…

Please, could anyone tell me how can I fix this issue. Thanks in advance.