Yes, absolutely. Any modifications to program files, including resource files, need to be backed up before an upgrade. Depending on the files that are modified, you may have to apply modifications to the new files after an upgrade, in the event that those files are altered. You should keep a record of those files modified. I usually copy the original file and append "-original" to the file name. After changing a file, I also back it up and add "-modified yyyymmdd" to the filename. Then I try to remember save copies of both the original and modified files, so that I can identify the modifications in the event that I have to do them to a slightly different version of the file. Since I ALWAYS make a backup before doing an upgrade, I at least get copies of everything before they get overwritten in the upgrade. |