Installing wpStoreCart Pro (and trying regular wpStoreCart) crashed WordPress and Firefox repeatedly (uninstalled wpStoreCart and it worked fine - also tested with 3 different themes). Dashboard and all other WordPress admin pages work until clicking on wpStoreCart settings. Took 5 days to get a response to first support request. Another 7 days to get another reply saying he was very busy and thought it was an issue with my server (checked with my server and the problem isn't there). I never heard back after repeated email queries to follow-up. This was 6 weeks ago. This is the first complaint email I've ever posted publicly before. Feel very frustrated.