Note:
MailWasher Free and MailWasher Pro have nearly the same version info (the only difference is the word "Pro" in the file name of MaiWasher Pro).
I contacted the developers of MailWasher and asked them to fix this, but until they have fixed it, you have to use the old version information.

Version Info in MailWasher Free (installed in my VM):

File name and path:     C:\Program Files (x86)\Firetrust\MailWasher\MailWasher.exe
Product Name:           MailWasher Pro
Internal Name:          MailWasherPro.exe
Original Filename:      MailWasherPro.exe

File Description:       MailWasher Pro
Company:                Firetrust
Legal Copyright:         
Legal Trademarks:       
Comments:               

File Version String:    2019.7.12.29
File Version:           2019.7.12.29
Product Version String: 2019.7.12.29
Product Version:        2019.7.12.29

Version info in MailWasher Pro (installed on my PC):

File name and path:     C:\Program Files (x86)\Firetrust\MailWasher\MailWasherPro.exe
Product Name:           MailWasher Pro
Internal Name:          MailWasherPro.exe
Original Filename:      MailWasherPro.exe

File Description:       MailWasher Pro
Company:                Firetrust
Legal Copyright:         
Legal Trademarks:       
Comments:               

File Version String:    2019.7.12.29
File Version:           2019.7.12.29
Product Version String: 2019.7.12.29
Product Version:        2019.7.12.29