Replace corrupted Numbers 3.2.2

How can I replace my corrupted Numbers 3.2.2 application with a fresh copy? The current one is no longer functioning as formerly: drops part of contents of cells at random when sent to printer, does not obey commands to put borders on cells, etc.

Have replaced the printer driver - that doesn't seem to be the problem. Don't want to download Numbers 3.5 because I am not yet ready to switch to Yosemite, which would be needed for this.

Any suggestions?

Hercule0420