DASYLab's focus has always been online data and analysis.
Having said that, there is a Read module that can be configured to read data, and, once it's read, to display, analyse, segment, and store the data.
It's not that hard to create a DASYLab Full application to configure a Switch /Action combination to allow the user to select a file for replay. DASYLab Basic does not have the Action module, so, you would need to manually stop the application, change the file name, and restart. You can do that semi-automatically by using Global Strings and the "Enter String at Start of Program" setting. The Filename can be specified as a global string.
Measurement Computing (MCC) has free technical support. Visit
www.mccdaq.com and click on the "Support" tab for all support options, including DASYLab.