Notes about the QUB file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The QUB file type is primarily associated with 'Qubus' by KPMG. Electronic questionnaires, surveys etc. A QUB file is a questionaire for Qubus. This file is actually a Microsoft Access database, protected by a password, which seems randomly generated. It has a number of tables, but two are important for the questionaire: Node and Strings. Node fields such as Title, Tag and NodeNumber, which are numbers linking to a field in String. It also has fields with RTF (Rich Text) with the questions. The entries in the Node table are a linked list: the field NextChild points to a Node entry which is the child of this entry. Parent points to the upper level of the entry and PrevSibling and NextSibling point to the previous and next question, respectively.