How did you "replace" it? Did you open the file in ACA, make changes, and save it? If so, there may be a BAK file of the old version. If AUTOSAVE was triggered while you were editing the file, you may have an intermediate version (with less to change back), in your Temporary Drawing File Location.
If you had the old version in a folder, and then obtained a new version and copied the new version to that folder, then the old version would be overwritten without creating a BAK file. Whether or not you can retrieve the old version depends on where that folder was, and whether you have any backups of the folder or whether any previous versions were saved by Windows. You could try right clicking on the file in Windows Explorer and choosing Restore previous versions from the context menu. If you are offered previous versions, check the dates and times to see if any could be from before the file was overwritten. If you have any sort of back up/archival program running, you may be able to recover the previous version of the file from the back ups/archives.
@David_W_Koch wrote:How did you "replace" it? Did you open the file in ACA, make changes, and save it? If so, there may be a BAK file of the old version. If AUTOSAVE was triggered while you were editing the file, you may have an intermediate version (with less to change back), in your Temporary Drawing File Location.
If you had the old version in a folder, and then obtained a new version and copied the new version to that folder, then the old version would be overwritten without creating a BAK file. Whether or not you can retrieve the old version depends on where that folder was, and whether you have any backups of the folder or whether any previous versions were saved by Windows. You could try right clicking on the file in Windows Explorer and choosing Restore previous versions from the context menu. If you are offered previous versions, check the dates and times to see if any could be from before the file was overwritten. If you have any sort of back up/archival program running, you may be able to recover the previous version of the file from the back ups/archives.
I checked the restore previous versions , it's blank. A now a whole other file is saved my original file's place. I tried using the converting .bak to .dwg method but it's showing new replaced file's backup in place of the original. What do I do?