Import RW5 projects to RW7 not working

I just upgraded to RW7 (version 7.0.1) and I have used the workaround to copy my add-ons to RW7 (RW7 old themes and addons). The themes that I use for the RW5 projects are visible. The stylesheets however were put in a folder ‘to install’ when I tried to install them:

I have saved my projects in RW5.4.1 but I cannot import them in RW7. I’ve tried to open them through RW7 (open>project) as well as tried to open the project with RW7. Both gave an error. My RW5 projects have an .rwsw extension. What am I doing wrong? I hope someone can help me with this.