How do I update my existing projects using MODX 1.0.5 to 1.0.6? Do I just grab the install directory found in the 1.0.6 install files, upload it to my projects, and run the installs as an upgrade?
Always make a backup first. If you have customized snippets or core files, they could be overwritten and your changes would be lost. Your procedure should be fine, but make sure to have a website backup first.