Hi Wendy,
As the data in my Klok has grown, it does momentarily pause at 70% (3 seconds or so) while initializing but does start up after that.
The database is a SqlLite database, and if you are feeling adventurous you could download an editor and extract all your old data from it.
There is a project on SourceForge that can open and browse the data file, http://sourceforge.net/projects/sqlitebrowser/
Needless to say, you should make a copy of the file before opening it in that tool.
HTH,