Rawb on "Dowload Error on File"

I am using Syncdocs to securely share files between two computers. I have noticed, however, that several files are missing from the second computer. I have made multiple attempts to download them including: Uninstalling and re-installing Syncdocs, Clearing my Syncdocs Cache, and deleting the files from the shared folder on both computers and Google Drive and then sharing the files again.

When I attempt to download them on the second computer, I get the following error:

Download error on file C:\SyncdocsFolder\EncryptedFile.txt.g_encrypt_aes256, will retry later.
(32) The process cannot access the file because it is being used by another process: [\\?\C:\SyncdocsFolder\EncryptedFile.txt.g_encrypt_aes256.sdtmp]  System.IO.IOException : sd criticality=0
Inner:
 Source: AlphaFS : sd criticality=0

However, the program never attempts to download the file again unless I clear the cache. And when I do clear the cache, the download just fails again.

Edit: Removed failed attempt at adding tags for clarification.