There shouldn't be any problem with the update, hundreds have downloaded and applied it successfully. I suspect your Norton AV has quarantined the EXE. Try opening Norton and teaching it that the "ApprovedWorkman.exe" file is safe.
I have become aware of three instances where an anti-virus program thought there may be a risk with the EXE because the utility that I use to shrink the executable file is also sometimes used by the bad guys when creating malware. In each of the cases, telling the AV software to trust the ApprovedWorkman.exe file was sufficient.
To quickly resolve this, be sure that your anti-virus software is up to date. Then check its quarantine and try to get the AV program to release/restore the ApprovedWorkman.exe file. If you can't, or can't find anywhere to convince the AV software to do so, then, you can get a replacement copy of the EXE file from the folder where you've been creating your AWdb backups. You should see a file named something like "CopyOfApprovedWorkman4117.exe" (note the version may differ). All you have to do is copy/paste this file into your live Approved Workman folder and then rename it to simply "ApprovedWorkman.exe". Naturally if you see another warning from your AV software, tell it that the file is trusted.
If you don't have the "CopyOfApprovedWorkman####.exe" file such as in your case where you didn't get a chance to run a backup using the newest version since you weren't even able to log in, therefore I will need to send you a fresh copy of the EXE. Please call or email me at Support@approvedworkman.com and I'll do so.