As I understand, your command history has been reset after your recent MATLAB crash.
Whenever MATLAB exits, the “History.xml” file that is present in the preferences directory will be written with the latest history. When MATLAB is reopened again, it will rename the existing “History.xml” file to be “History.bak” file. Since you faced a crash recently it is possible that the “History.xml” file could be loaded in a corrupted state.
To determine the preferences directory, use the command below:
>> prefdir
You can look at the current “History.xml” and the “History.bak” files in any text editor and see if they contain the expected history. If so, just make sure the determined file is named as “History.xml”.
However, if you have opened and closed your MATLAB application after the crash, there is is a good possibility that both files have been over written since, and the more recent commands may be completely lost.
