That is, unless...in my case...you do a backup that you can easily restore.
And...in this case...I come to a forum like this and ask questions before I just foolishly install the beta.
I think I am taking the most careful steps I can right now.
Thanks to those of you who have given me helpful answers thus far.
Looking forward to hearing what does or doesn't work under the beta release.
I agree that don't try the DP1 if you really need those apps. Of course, you can always restore your computer to the current OS, but I guess that's not your intension, right?
Even though these apps works for the others, you may still face lots of troubles, or the apps only works intermittently.
If you already do all the precautions and ready to be a beta tester to see if these apps works, go for it, but please expect you have to restore your computer at some stage.
Anyway, unless you really don't care about to restore your computer. It's better to install this beta OS on another HDD rather than your current boot disk.