This is a "UO Pro" Utility, which means that its use promotes and is in keeping with the spirit of the Ultima Online product, community and value system, and the use of this utility by players will not be considered by Origin Systems, Inc. as cheating.
This product was created, and is marketed and distributed by Tugsoft under license from Origin Systems, Inc. ORIGIN SYSTEMS HAS NOT TESTED THIS PRODUCT IN ANY WAY WHATSOEVER AND DOES NOT KNOW WHETHER IT WORKS IN ANY OR ALL REASONABLY FORESEEABLE SITUATIONS OR THAT IT WILL NOT CAUSE DAMAGE IN SOME REASONABLY FORESEEABLE SITUATIONS. Tugsoft solely warrants that this product will work as intended to your reasonable expectations, and does not infringe anyone's intellectual property rights.
To verify that this product is a "UO Pro" utility, please go to Origin's website at http://uo.custhelp.com/cgi-bin/uo.cfg/php/enduser/std_adp.php?&p_faqid=339 and locate the name of this product. Follow the link on Origin's page back to this site. If you can't find this product listed on Origin's website, then this product is not an approved "UO Pro" Utility. Any and all unauthorized use of the UO Pro logo and/or other false claims of approval are strictly prohibited and shall be prosecuted." Updated link
UOAssist.exe - Version 1.9.1 - June 22, 2018
The link above is for UOAssist.exe which will install itself as well as launch UO and add the UOAssist functions to the game.
Test files are now downloaded using UpdateAce. Press the settings button at the bottom right of the update/news page. Then set UOAssist to check for test files. When a test version is available a button will appear that allows you to download them if you'd like.