On Center Software recommends that if you have bids due that you wait to install any upgrade until you have sufficient time. It is also a good idea to make an archival backup of your database files before installing any upgrade.
Once the download is complete, double-click the file to run the Installer.
The installer will remove your previous version, then install the upgraded application.
NOTE: Your data files will not be affected until they are accessed in this version of On-Screen Takeff.
Note: On-Screen Takeoff 3.6 is an upgrade to 3.4.1 and 3.5, if you have a version of On-Screen Takeoff prior to v. 3.4.1.526, you will need to uninstall that version before installing v.3.5. Uninstalling On-Screen Takeoff does not affect your data files.