Was this a clean install or an upgrade? My guess is an upgrade. PageTitle was changed from a UserControl (.ascx) to a WebControl (no .ascx is used). If you are getting that error my best guess is your web.config is an old version as the control declaration under the pages section was changed in this version to reflect the change from usercontrol to webcontrol for several controls inlcuding PageTitle. Please compare your Web.config to the one included in the download.
As for the version issue, it should automatically update when the application starts as long as you deployed all the files. Specifically, make sure webroot/Setup/SchemaUpgradeScripts/mssql/mojoportal-core folder exists and that it contains files named 2.2.1.7.config and 2.2.1.8.config
If those files exist try recycling the app by typing a space into web.config and save. Or actually fixing the control declarations mentioned above will cause the app to recycle so it should upgrade.
Hope it helps,
Joe