The installer isn’t the same for both but if you already have Home installed, all you have to do is enter the Pro license key and avast! will transform itself to Pro.
Do the email instructions look something like this?
This e-mail was generated by a mail handling system. Please do not reply
to the address listed in the “From” field.
Please read the CUSTOMER SERVICE section for answers to your questions.
We recommend that you make a backup copy of this e-mail (e.g. print out a
hard copy).
Dear Customer,
Thank you for placing an order with share-it!. You have purchased a product
by ALWIL Software a.s…
Contents:
A. Brief information on product delivery
B. Details for product delivery for avast! 4 Professional Edition, 2
years
C. Technical Support
D. Customer service
A. Brief information on product delivery
Use the license key to unlock the product (see below).
Please note that you will not receive a delivery by postal mail.
B. Details for product delivery for avast! 4 Professional Edition, 2
years
The product is licensed to “Your Name”.
The license key for “avast! 4 Professional Edition, 2 years” is listed
below. You will need this license key to complete the process and activate
the product. The license key and the text below originate from the software
publisher and may be written in another language.
Dear customer,
thank You very much for Your purchase. You were successfully registered for
using avast! 4 Professional Edition antivirus program on 1 PC(s). Your
license allows you to update/upgrade avast! 4 Professional for 2 (two)
years from the date of purchase. Your license key is
----cut here----
W12345678R6789A1106-?!?!?!?!
----cut here----
Print this mail and save it for future usage, please.
Follow the instructions below for entering your new key into installed
Avast! program:
- Start Avast! program and during memory scan press the “Registration”
button. There will be Registration dialog displayed. You can also find this
dialog in Simple or Enhanced user interfaces under About program avast! →
Activation Key
- Enter the key. (NOTE: if you are unsure when entering number 0 or letter
O, enter rather number 0 (zero)!) The best way to enter the license key is
Cut&Paste method - select entire key in this mail, press Ctrl-C, switch to
avast! registration dialog and press Ctrl-V. Then press OK button and your
avast! is registered.
It is recommended to update your virus database via the iAVS service. Just
click on the “flash” icon in Simple user interface or “flash” icon with
iAVS description in Enhanced user interface.