• in the application the displayed version number is 5.55.7.
• in VulnDetect the displayed version number is 1.0.7 / 5.55.7.

The reason for this confusion is, that there are two different versions of Sandboxie available:

• Sandboxie with the version number 5.55.7
• Sandboxie Plus with the version number 1.0.7

You see both versions at the download page of the current release:
https://github.com/sandboxie-plus/Sandboxie/releases/tag/1.0.7

Here a screen shot of the Help -> About window of Sandboxie:

Here a screen shot of the Help -> About window of Sandboxie Plus:

Sandboxie is shown on the Windows 10 Start Menu and in the Help -> About as Sandboxie.
Only at the download site they call it "Sandboxie Classic".

I have Sandboxie installed, so you should show the version number 5.55.7.
The version 1.0.7 should be removed, because this is for Sandboxie Plus

@Tom
You should install Sandboxie Plus in one of your VMs, because I already have installed Sandboxie in my VM and I can not install both versions on the same system (I just installed in the Windows Sandbox to get the version info).
I already requested Sandboxie Plus here: Sandboxie-Plus - App-Request

Here the information extracted from the EXE file of Sandboxie

File name and path:     C:\Program Files\Sandboxie\SbieCtrl.exe
Product Name:           Sandboxie
Internal Name:          Control
Original Filename:      SbieCtrl.exe

File Description:       Sandboxie Control
Company:                sandboxie-plus.com
Legal Copyright:        Copyright © 2020-2022 by David Xanatos (xanasoft.com)
Legal Trademarks:       
Comments:               

File Version String:    5.55.7
File Version:           5.55.7.0
Product Version String: 5.55.7
Product Version:        5.55.7.0

Here the information extracted from the EXE file of Sandboxie Plus

File name and path:     C:\Program Files\Sandboxie-Plus\SandMan.exe
Product Name:           Sandboxie-Plus
Internal Name:          SandMan.exe
Original Filename:      SandMan.exe

File Description:       SandBoxie Manager
Company:                sandboxie-plus.com
Legal Copyright:        Copyright (C) 2020-2022 by David Xanatos (xanasoft.com)
Legal Trademarks:       
Comments:               

File Version String:    1.0.7
File Version:           1.0.7.0
Product Version String: 1.0.7
Product Version:        1.0.7.0