I have the PD 20 disk and did my install from that. I'm getting errors when editing project or creating iso files. I was wondering if it would hurt anything (i.e. make things worse) if I just did a reinstall. I put the DVD in and started the process, hoping there was a 'repair' option, but there isn't. Is it okay to just proceed with the installation to see if it helps? I have used the second disk to install additional accessories.