By default, EZChangeLog Professional Edition installs and maintains it's data in this general location for each User Account.
C:\Users\<User Account Name>\Documents\EZChangeLog
OR
C:\Documents and Settings\<User Account Name>\My Documents\EZChangeLog
as illustrated in this screen shot - EZChangeLog - Program Settings - General Settings

And, EZChangeLog Reporter can read those data files IF you use the default User Account locations.
EZChangeLog supports CUSTOM File Locations, and EZChangeLog Reporter CURRENTLY does not support CUSTOM File locations.
EZChangeLog Reporter program data is stored in the same EZChangeLog User Account folder.
The menu selections shown from each program opens the same user account data folder.

EZChangeLog Reporter stores the following data files in the EZChangeLog User Account folder.
ECRQuery.tps - Queries
ECRXls.tps - Spreadsheet layouts
ECRViews.tps - Browse Views
ECRRpt.tps - Custom Reports
ECRcts.ini - Query Filter status and Last query used
eclrpt.ini - EZChangeLog Reporter program ini information
Also, this system file - applies to program use regardless of user account information locations:
EZChangeLog Reporter upg.tps is stored in this location
C:\ProgramData\Encourager Software\ECLReporter
(EZChangeLog maintains it's own version of upg.tps according to the program settings location)
Page url: http://www.encouragersoftware.com/eclrpthelp/index.html?program_data_locations.htm