Hmmm, looks like an incomplete/corrupt installation. You may want to try Restoring Preferences and possibly a full uninstall/reinstall.
But before you do that...
1. Go to Site > Manage Sites
2. Click the site you're working on
3. Click Edit (pencil icon)
4. Click Advanced Settings
5. Click File View Columns
6. Click to highlight the name of the Modified column.
6a. If it's not set to "show" click Edit (pencil icon) and check the box for "show", then click the up arrow icon to move it just below Name
6b. If it is already set to "show", while highlighted, click the up arrow icon to move it just below Name. This will make it the first column after the file name in the Files window
7. Click Save
That will reshuffle your Files Window columns.
If it doesn't work, or you still can't see the options, restore prefs and see if a corruption of the preferences file is causing it. Corruptions of the prefs file can happen even on a brand new/fresh/first time installation. If it still doesn't work after restoring prefs, a full uninstall/reinstall is likely in order.
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