What actually ends up on a Computer running an Orixa App? 

An Orixa App is a Windows executable program, which stores data in a database. Users access the data through the App, or through data-linkages to the database from other programs like Excel, Word etc.
Orixa is quite straightforward: It requires the database and executable program to be installed, plus a few additional files such as a spell-checking files for your language(s), and a software logo file which you can change. The installation requirements are minimal. There are no additional complex libraries or dependencies built into the system.
 
In an office network, Orixa is usually installed on one central server computer, and all users access this central database, running a program which is stored on this computer. All users can continuously share data, without the need for any installation on an individual machine. In this case there is zero installation on individual Users' computers. The only installation process is to run a small utility which adds items to the Users' Computer's Registry-Keys, these are added for security to stop unauthorized users from running your Orixa App.

In a distributed situation several databases can be installed in different locations. An update process is then used to share / synchronize data between locations. A location can be a single staff member's computer, or a separate office-server with multiple users. In these cases each individual location will have the same files that would be installed in the single-server system.

Once running an Orixa App may generate additional files (for example reports in the form of PDF files). These files will be stored on shared folders at each server.