From this paragraph (I have to search for the original in english, since the MS website insisted on showing me the portuguese version) and giving bold font for the key words:
a. Individual license. If you are an** individual **working on your own **applications to sell **or for any other purpose, you may use the software to develop and test those applications.
If you are a company, you cannot have more than 5 users, otherwise you will need to purchase the professional version.
So, the answer is: Yes you CAN use.