I've installed Kaluach3 and it appears that you can transfer the notes through the Backup function. Go to File > Backup and save the given file to the CSV format. If you have it on another PC, copy the file on a USB drive and then move it to the new PC. Download the software from the following link and install it: http://www.aish.com/jl/hol/o/48970511.html
After installation, start Kaluach and go to File > Restore. Specify the file, folder and then continue the restoration procedure and your notes will be available again.