@Cobra You seem to be having a huge amount of problems. Please create a support ticket and include your serial number so our tech support team help you out. You obviously have some corruption on your system or some unsupported configuration. They can help you out so your system is set up properly again.
@Cobra If its of use to upscale the video clip(s) before using in your project, then the VFR2CFR util via my signature can upscale by 2x. You can set the the quality, thus the file size as you want, high or low.
Or, use the util to upscale to 4k after you render out to FHD. This setting is called “Double” in the util, requires ffmpeg installed and added to the Windows PATH.