When my PC locked up
maybe a factory reset may help, please first read these posts below, first, then make a decision as to what to do.
In order to hard, factory, reset your palm, you must press the reset button on the back (with the top of the stylus, or an opened paper clip) while holding down the power button.
You then let go of the reset, while still holding the power button. When you let go of the power button, you will see the Palm splash screen.
Once you see that screen, let go of the power button. You will be prompted to press "up" on the D-navigation button to delete all data. Do so, and your Palm will be totally reset. Now it should be as from the factory... However ALL ANY personal data may be deleted, so it is advisable to have a backup before one does this. This will/should however restore everything, then hopefully you can then put back the calender files data.
Also you may also be able to mount the unit under windows, and go to where you changed those files and change them back to what they should be, this too may help. There is software on the 'net, that can assist with the mounting of these devices, to do this.
See this post below...
http://forums.palm.com/t5/Windows-HotSync/Tungsten-E2-erased-all-calendar-items-How-can-I-restore-them/td-p/316005/page/2
Below is your user guide, below that is your handbook.
www.palm.com/us/support/.../tungstene2/.../tungstene2_handbook.pdf
www.palm.com/us/support/.../tungstene/TungstenE_HB_ENG.pdf -
The TE2 manual at Palm.com, User Guides, Managing your calendar, a 37 page PDF file, page 22:
Open the Purge dialog box:
a. Open the menus.
b. Select Purge on the Record menu.
Select the events to purge:
a. Select the Delete events older than pick list and select a time frame.
b. Check the Save archive copy on PC box if you want to place a copy of the deleted events in an archive file on your computer the next time you synchronize.
c. Select OK.