Full changelog:
Added check to installation script and upgrade scripts to ensure that SIP 4.19.3 is installed when PyQt 5.9 is installed. The combination of SIP 4.19.4 and PyQt 5.9 causes Rapid Photo Downloader to crash. Because SIP 4.19.4 is installed by default when installing PyQt 5.9, the install and upgrade scripts forcibly revert to SIP 4.19.3 when PyQt 5.9 is installed.
Add option to manually mark files as previously downloaded, allowing for occasions when another program has already downloaded the files. Right-click on one or more photo or video thumbnails to mark them as previously downloaded.
Fixed bug in upgrade script when reporting an operational failure.
Updated Chinese, Dutch, Italian, and Norwegian Bokmal translations.