Is there a limitation on number of times I can install the program?

Answer:

You may install the program any number of times on any number of computers for evaluation purpose.

Once you have purchased the license of the needed type, you can activate the program on the number of user accounts allowed by your license. Then, you may use your copies of the program for personal or business purpose allowed by your license.

Copies of the program you haven't purchased a license for must be removed from your computers. Their usage for personal or business purpose is illegal.