Do you experience problems during downloading?
Check your connection in Status and Interface settings window.
Use Test Server in Config > Servers.
We will probably ask you to do a test using only basic settings.
Do you experience problems during repair or unpacking?
Enable +Debug logging in the Status and Interface settings window and share the relevant parts of the log here using [ code ] sections.
You need to drop the "re:" part from your regex on that pythex website, otherwise it will only match strings that literally include "re:" such as "re:REMUX" or "re:DVD". Also note that with "DVD" in that list of alternatives, "DVDRip" is redundant, as anything matching the latter would already hit on the former.