I don't think there is one. There is something called the online interactive demo here which is supposed to be the equivalent of the trial version, but I never tried it and I don't know exactly how it works.
I have a Program in LV7.0. I thought I could change it to LV6.0. However apparently I can only change it to LV6.1. Unfortunately I do not have LV6.1! Thus I am stuck!
I would like to thank you for your advice. I am trying my best to follow your advice. I am constraint by TIME and MONEY. I come from a THIRD world country where anything in US Dollars is expensive. I cannot afford to attend a FORMAL labview course. The equipment I am using is outdated. I cannot afford to UPGRADE to LV7. I do not have the time to thoroughly study the LV HELP NOTES & EXAMPLES. I wish I had the time!
I would like to thank ALL who have replied to my postings. One day when I am an expert in LV I hope to repay your kindness by helping someone else in this FORUM.