First, please do not post in all capital letters. That is interpreted online as shouting.
Second, there is no cheque tab in any version of Manager. Cheques are recorded as bank transactions. There is no ability to print cheques, since format and content requirements vary country by country.
Third, to see which version of Manager you are running, read this Guide: Manager Cloud. To see the current version, see Download | Manager.
Fourth, to update the desktop edition, download and install a new version exactly the same way you did the earlier one. Do not uninstall anything first. If you are using a Mac, see Manager Cloud.