If you have not yet changed/added any data.

Simply replace your existing ZDN program and files with the new versions
- Remove both the old version and the ZDN Support Files folder
- Download new version
- Follow original installation instructions

If you HAVE entered data about your zoo, feeds, animals, or diets...

In ZDN:
- Open up the new version of ZDN
- Go to Settings (or the Settings Setup pop-up that appears if no datafile is linked yet) V2.2 and later: click the "update datafile" button.
- Follow the steps to link to your old datafile (v2.1 and earlier: BUT click "NO" when asked if you want to load the new file. If you do accidentally click Yes, cancel out of all the errors and repeat this step.)
- Click the "Update datafile Part A" button and follow the pop-up instructions carefully.
In the datafile:
- Click the "Update Datafile Part B" button.
- Quit the datafile
Reopen ZDN, and relink it (in Settings) to your updated datafile.

You may want to move two files from the new ZDN Support Files folder to your existing installation:

Move the NaviGatorIcon3.ico file from your new ZDN Support Files > Images folder to your existing Images folder
Move the new DietAnalysis_2.2.xltm file from your new ZDN Support Files > Templates folder to your existing Templates folder

Tips and tricks:

Be sure to update your analysis spreadsheets to the new v2.3 ones
- File Explorer: Copy 2.3 versions of both templates from your download to ZDN Support Files > Templates
- ZDN: Settings > Diet Analysis - change to 2.3 versions
Depending on your updating process, you may run into issues with the NUTR_DEF table. I changed the name of "BGT_Name" to "Local_Name". If you get a message about this:
- Open up your datafile (make sure you and everyone else using it has quit ZDN first)
- Press [F11] to show tables (if they aren't already showing down the left side)
- Open up "NUTR_DEF" table
- Either:
  - Select the column called "BGT_Name" and copy it to the "Local_Name" column
  - or
  - Rename the column called "BGT_Name" to "Local_Name" (right click on NUTR_DEF and choose "Design View")
- While you are there, "Compact and Repair" (Database Tools > Compact and Repair) the datafile.