"The signature of the program is corrupt or invalid." is a message that will pop up when your computer does not recognize the signature of a .msi program. Note our LMNsync.msi file (the update) is safe to download, so you can ignore this error message as long as you are sure you are opening the file downloaded through the LMN QB Sync Tool and download the update.
If you would like directions on how to download the update file and install it, see below:
1. Launch LMN's sync tool. Accept the critical update by clicking 'Ok' or 'Yes'. Make sure to click 'Save or Save As' rather than 'Run' (this will download the update file to your computer).
2. Go to where the update file downloaded to on your computer (usually, your computer will default all downloads to your "Downloads" folder). Find the file called lmnsync.msi
3. Now right click on the downloaded file called lmnsync.msi (Windows says it is corrupted- it is not, do not worry) from LMN to install.
4. Select "Run", or "Run Anyway", to allow LMN to complete the update. The lmnsync.msi file is safe to run and will update the LMN Quickbooks Sync program the latest version.
After following these steps, the program will complete the update installation and you will be able to use LMN's Quickbook Sync Tool.