upgrading is the process of replacing a product with a newer, better or more comprehensive version of the same product.

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At TPTQ Arabic you can upgrade previously licensed fonts in other formats to OpenType. We will deduct the price of the fonts you have already paid for. For example, if you upgrade the PostScript version of Fedra Sans Book (for which you paid €60) to Fedra Sans Std Book...
For technical reasons, PostScript fonts can’t be used to create web-embeddable fonts, so if you licensed PostScript versions of our fonts, you will first need to upgrade to OpenType versions.
Yes you can. Just log in to your account, open your order history, click My Fonts and then the Upgrade button.
We canʼt release fonts to users who haven’t agreed to the Typotheque EULA and bought a licence. We understand that it is difficult to make a decision as to whether a given typeface is suitable for your particular needs, which is why we offer several ways to preview and test...
We occasionally publish updates of our existing fonts. These updates are often improvements such as additional language support, additional glyphs, or improved kerning. You will be notified by email of major updates to fonts that you have licensed so you can download the updated fonts directly from your account.

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After licensing a single font you can always upgrade it to a complete package, and you will never pay more than the total price of the complete package.
Information about multiple-user licence pricing of TPTQ Arabic font software. With the Multiple-User License, you can cover additional font users for a fraction of the regular price.