Hi You can ignore these messages. Some deprecated properties were removed in the version 7. And updating of all skins is strongly recommended (reloading of internal skins too).
If I open any project then I get errors when compiling, this forced me to go back to Version 6.68
You must open all forms where TsSkinManager placed (ignore warnings) and resave them. You will not have this problem if form is resaved with version 7.
PS. All internal skins must be reloaded, changed from v6 to v7