If you'd like to increase the number of recent projects listed in your FM welcome screen then you'll need to modify the bmt.ini file in Framework manager to increase the number of project files to list within Framework manager welcome screen.
In order to achieve this you must
1) Go to your Cognos install path
2) Navigage to the subdirectory called /configuration
3) Make a backup copy of the bmt.ini file e.g. bmt_orig.ini
4) Edit the bmt.ini file using Notepad.
5) Locate the following section in the file:
Preference Name="RecentProjectListSize">4
to
Preference Name="RecentProjectListSize">8
This will give a list of 8 recent projects instead of the default 4 in Framework Manager.