I tried to sync but nothing happens. I checked the Sync Log. It shows it started and completed but didn't do anything.

Before you do anything, please make a recent backup copy of your files. See these instructions:

MasterCook 24 Backup

Next, please reset the syncing files on your computer as explained below. Then sign back into your account in the sync manager. Wait for it to finish loading. Then check the MC Tools and My Collection sections of the Sync screen and confirm things look as expected before you sync.

RESETTING SYNC FILES FOR MASTERCOOK 24

First, make sure you have a recent backup copy of your MasterCook files on your computer. Please backup your files on a regular basis.

Next, please restart your computer and do not use MasterCook yet. Open this folder on your computer:
 
C:\ProgramData\MasterCook 24

If you do not see the ProgramData folder within the C drive, that means Windows is hiding it from you. See this article: How to Show Hidden Files on Windows 11
 
Then delete the JSON files and the MCW file from that folder. If there are several MCW files, delete all of them. See the screenshot below. Then startup MasterCook and launch the sync manager and sign into your account. Make sure things look as expected before you sync.

PREVENTION

1. Please backup your files on a regular basis. See these instructions: MasterCook 24 Backup
2. Please always follow the instructions in this article when syncing from now on: MasterCook 24 Sync Manager
   The above article also lists things that will cause syncing problems (see the Encountering Problems section within that article), so please review those before you sync.

The same MasterCook 24 Sync Manager article includes a section for Best Practices as well as Error Message Explanations.

RELATED ARTICLES

Clear Recipes from MasterCook.com -- Something to consider if you wish to start anew with syncing.

Recover Deleted Recipes within the Sync Manager -- You are able to use the sync manager to recover recipes that were deleted from your online account.